Saturday, 25 October 2014

Refining vs. Redefining

     It may be a little late to the game to be talking about this, now that a clear majority of people in Canada and the U.S. actually favour same-sex marriage, but just the other day I was talking to someone who brought up the linguistic argument. He had no problem whatsoever with same-sex relationships; he just objected to changing the meaning of the word "marriage", which (he argued) has always been understood to mean a particular sort of relationship between a man and a woman, and that if we're going to sanction similar sorts of relationships between men and men, or women and women, we should come up with a new word for it, rather than dilute the meaning of good old-fashioned "marriage".
     This seems like the sort of argument that would appeal to someone like me, because I tend to be the grammar/usage purist at dinner parties and similar events, and I place a great deal of value on using words correctly. I reliably object whenever someone tries to explain acupuncture or shiatsu using phrases like "energy lines", because energy is a well-defined and quantifiable scientific concept: force times distance. I tremble with rage at "irregardless" and don't even get me started on using quotation marks for "emphasis".
     And yet, expanding the set of relationships captured by the word "marriage" does not bother me at all. Why?

     I don't love words and grammar and punctuation rules for their own sake. All by themselves, they're kind of arbitrary, and any number of other equally effective rules could be devised. Indeed, they have been: that's what other languages are. In English, we tend to distinguish between subject and object by word order (subject - verb - object), but in Japanese, the subject is often simply implied, the object marked by a partical, and the verb at the end of the sentence goes.
     No, I care about English words and the rules of grammar because I understand how versatile they are and how they can skillfully be used to convey meanings with rigorous precision or with playful ambiguity. I don't object to people knowingly misusing a word for effect; that's not actually a misuse. I do object to habitual misuse that degrades a useful meaning so that I can't use it anymore, and have to go into a long pedantic exposition before I can get to my main point. (Okay, so maybe I seem to like being pedantic, but I'd rather be able to get to the main point. When I have one, anyway.)

     So I want the words I use to be useful. I want them to capture the meaning that is really at the core of what I'm talking about, and not merely some label for an arbitrary list of elements. Let's imagine, for example, that everybody only ever used a Thermos to keep hot drinks hot, and if you asked anyone what a Thermos was, they'd say "It's a special kind of bottle that keeps hot things hot." Let's say the word came to be defined that way (assuming it lost its trademark status, that is), and dictionaries universally adopted that definition.
     Then, someone discovers, that if you put a cold liquid in a Thermos, it stays cold longer! My goodness! What a discovery! Whatever shall we call this new function? If a Thermos is a device that keeps hot things hot, we can't call it that. Maybe Cryos or something?
     But that's silly. It's the same object, whether it's used to keep things hot or keep things cold, and moreover it's actual function is neither, but to limit the flow of heat energy between the inside and the outside; whatever the temperature is. The appropriate thing to do is to revise our definition of the word, not to invent some brand new one in order to preserve an outdated (mis)understanding of what the old thing was.

     I applaud this kind of refinement of meaning. Words are tools, and I want them to be the best tools we can make them. We should be wary of discarding their traditional meanings too quickly, because very often there are good reasons for why a word came to mean what it does; the words we have today are the product of many generations of productive bickering among writers and speakers and philologists who probably raised and considered many of the same concerns we think we're bringing up new today. But we should also be willing to change the old meaning when it is clearly inferior to the new proposal.

     And that's what I think is true of the word "marriage" today. I don't necessarily accept that the word itself just meant one man and one woman before, but even if I did, I submit that that's a pretty inelegant kind of word to preserve. We know now that the legal status that goes by the name of "marriage" when it applies to a man and a woman can also perform the same function with a man and a man or a woman and a woman. Insisting that we come up with a new word for it in those cases is just as silly as insisting that we can't call something a Thermos when it's used to keep something cold instead of hot.
     Yes, I care deeply about the integrity of our language, and to me, the word "marriage" is made stronger and more useful, not diluted, by expanding it to include all spousal relationships regardless of the gender permutations involved. What that couple has is a marriage, and I don't actually need to know what their genders are in order to understand the essential qualities of their relationship.


Thursday, 23 October 2014

Calm down, everyone. It's just an idiot.

     Yesterday, in our nation's capital of Ottawa, there was an incident that has drawn a great deal of attention and led to much wringing of hands. A man with a hunting rifle shot and killed a soldier standing guard by our National War Memorial, and fled the scene in a car. Shortly thereafter, the same shooter arrived a couple of blocks away at Parliament Hill, and ran into Centre Block. There were two exchanges of gunfire, after which the shooter lay dead. There were two casualties: the shooter and the soldier he had shot. Some of the staff in the Parliament block were injured, but no one else was killed.

     Now, this certainly was a significant event, and definitely newsworthy, but let's try to put it into perspective. So far as we know, one person, for reasons known only to himself, undertook heinous acts of violence. He murdered one guy, and then was shot while presumably trying to murder some others. We grieve for the man he killed, Cpl. Nathan Cirillo, and the shootout on Parliament Hill is scary to contemplate not just because it's where our government does its work but because it's a location so familiar to us from media scrums and tours. (I was there myself earlier this year.)
     But that's about as far as it should go. This was not a meaningful attack on us as a nation or an act of war, because a lone deluded individual doesn't and shouldn't have that kind of power. Back in 1981, a mentally ill man shot President Ronald Reagan in the bizarre belief it would impress an actress he was infatuated with. What does it matter who yesterday's shooter was trying to impress, or what ideology he thought he was advancing? He was a criminal idiot, and that's how we ought to react to this.

     The sad truth is that people are murdered from time to time, even in Canada. It's a tragedy when it happens, and we should look to ways to prevent it, but the happier truth is that it happens less and less often. More and more of us live our entire lives without ever killing anyone. Violence may never completely disappear from human society, but it is in decline. A side effect of that decline, though, is that we are more shocked by violence when it does happen, and perhaps a little more prone to overreact.

     So what should be done?  I'm not sure we need to do much differently at all, at least not in response to this incident. It's just another data point to consider when formulating policy on a number of issues: gun ownership, mental health, etc. Probably security procedures at Parliament Hill may need to be revised somewhat, as it's a little troubling someone was able to run all the way up into the front door and get as far as the library while brandishing a hunting rifle. They make visitors go through metal detectors, after all. And yet, let's not forget that he actually failed to kill anyone else, and ended up dead himself. Although he shouldn't have got as far as he did, they did stop him.
     But there is absolutely no reason why this should have any impact whatsoever on foreign policy. It should not dissuade us from participating in the fight against ISIS, nor should it stir us to escalate our contribution. The criminal stupidity of a lone gunman should not move us to anger or fear. Let's not give him that power.

Monday, 13 October 2014

Dreams of Certainty

     Last week, I was reminded of a dream I once had, many years ago as an undergraduate in philosophy. Perhaps it was because I fell asleep while listening to Beethoven's 9th Symphony, but in my dream I had been working through a philosophical question, and suddenly had an epiphany: all the pieces of a proof suddenly fell into place. In that moment, I knew, I really knew with absolute certainty, that I had just proved with perfect logical rigour, relying only on unassailably self-evident premises, the existence and immortality of the soul!
     And then I woke up, and it evaporated. I could not remember anything about my proof, other than the conclusion, which by itself is no proof at all. I tried my best to reconstruct it, but I came up with nothing.
     There were two choices I had at this point. I could take my dream at face value, relying on that feeling of certainty to assure me that the proof actually existed and was still out there for me to rediscover, which I dearly wanted to do. Or, I could recognize that in all likelihood, what I had dreamed was not the proof itself, but the feeling of having found it, and there was no particular reason to believe any such proof actually existed. Eventually, and with some disappointment, I had to accept that the dream was just a dream.

     Although I hadn't consciously thought of this experience in many years, it seems to have played an important role in shaping the skepticism that has characterized most of my thinking since then. In particular, if you've read through the lengthy comment threads on some of my more theological postings here, it illustrates why I have never accepted the subjective claims of certainty promised by my anonymous commenters. They assure me that if I would only open my heart to Jesus, I would then know, really know with absolute certainty, The Truth. And once I had that sense of certainty, I would need no further proof.
     But I know that sense of certainty already, and I am unimpressed by it, because I am aware of the possibility that it can be mistaken. How certain you feel about something bears little relationship to how likely you are to actually be correct, and so even if you promise me that I'll feel certain and even if I believe you that I will feel certain, none of that amounts to an assurance that I'll be any closer to knowing the truth.
     Some people are really uncomfortable with uncertainty. They crave that feeling of certainty, and feel it gives them strength, and maybe it does that. I will probably never know that kind of comfort outside of a dream, but I'm okay with that. I find a different kind of comfort in being aware of my own fallibility, in knowing that while I'm very likely wrong about most of what I believe, I am wrong honestly, and willing to correct my errors when I become aware of them. In a way, it's kind of exhilarating, like taking off the training wheels or jumping in at the deep end of the pool. It isn't that I find the risk of being wrong a thrill; it's that I've learned that the apparent safety of the training wheels or the shallow end of the pool are illusions.

Sunday, 12 October 2014

Misquoting and Misspeaking

     Once again, I must bring up the proper use of quotation marks. They are not to be used for emphasis. See? I just emphasized "not" with italics. And just now, I set apart "not" with quotation marks because I'm referring to the word itself, not its meaning or reference or anything else. Putting something in quotation marks means you're quoting (hence the name) what someone said, not paraphrasing or restating.

     I bring this up because another pseudoquote just crossed my Facebook feed today, this time attributed to Vice President Joe Biden.

"No ordinary American cares about their constitutional rights."

     The image circulated with this alleged quote goes on to say, "Yes, America, our Vice President said that!" Except he didn't. He did not utter this sentence.

     I watched the video, and what he does say is almost as dumb, if you take it strictly literally: "And let me say at the outset to all the press: No law-abiding citizen in the United States of America has any fear that their constitutional rights will be infringed in any way. None. Zero."
     That is obviously false. There's lots of law-abiding citizens in the U.S. who do fear that their constitutional rights will be infringed, and lots of law-abiding citizens whose constitutional rights are infringed every day. (The practice of civil forfeiture, for example, has gotten rather out of hand, which I take to be a pretty clear violation of the takings clause of the Fifth Amendment.)

     Now, you could take Mr. Biden as meaning exactly what he said, and if in fact he does believe that no law-abiding citizen does fear infringements to their rights, then statement attributed to him in the image macro would be a defensible inference about his beliefs. But it's not a quotation. You could say "Joe Biden believes that no ordinary American cares about their constitutional rights", and that'd be fine. Just don't use quotes unless you're actually quoting the actual words he actually said. (Seriously, is that so hard to understand?)

     But I want to go a little farther and argue that this would be a silly and uncharitable inference about Mr. Biden's actual beliefs. To me, it seems far more likely that he missed a word in his written speech, and that what he was supposed to say was that no law-abiding citizen has any reason to fear infringement of their constitutional rights. If you watch the video from the beginning, you'll see a couple of similarly clumsy oratory missteps.
     Let's be fair. Public speaking is not an easy thing to do, and mistakes happen. Working from a script (which is what any written speech is going to be, even if you write it yourself) has its own difficulties; it takes time to absorb the flow of the lines and internalize their meaning, and to find your own inflections, pauses, emphases. Joe Biden may be affable and confident, but if he's a gifted orator than this was not a day that showed it. Interpreting what someone says always takes a bit of cognitive effort at the best of times, and sometimes requires us to cut the speaker some slack while we correct for errors. We should do this regardless of whether or not we agree with the speaker's views, because successful communication is a matter of trying to discern what the speaker actually means, rather than seizing upon whichever meaning reinforces our own beliefs.

Thursday, 9 October 2014

Fair Warning and Photo Radar

     I've written before about speed limits, and generally argued against speeding, so it may come as a surprise that I have received seven photo radar tickets. Admittedly, six of them came over several months after I had my license plate stolen by some nitwit who apparently drove a 1985 Supra, if the images on the summonses are to be trusted. I had reported the plate stolen promptly, so I never had to pay any of the six, and needless to say, it wasn't me speeding.
     The seventh was just this past year, and it was for going 60 km/h in a 50 zone, which wouldn't have bothered me but for the fact that it was a short stretch of the road between two zones where the limit was 60. Also, it did surprise me a little, because I had always understood that there was an unwritten rule that they wouldn't issue a ticket if you were within 10 klicks of the limit, not that I have ever thought that was a valid legal argument against any actual speeding ticket. And also it was probably my wife driving.

     Now photo radar has become a hot topic again here in Edmonton, with the mayor responding on his blog to a petition of angry drivers who want photo radar abolished. They argue that it is a cash cow, that it doesn't actually make us safer, and that speed limits are too low anyway. I'll not address those again here, but instead, I wanted to consider what Mayor Iveson said (and I've said in the past myself) about speed limits, and how exceeding them at all is illegal, period, end of story. I agree with that, of course, but I want to argue here for why there ought to be a buffer as a matter of policy, and how it should be handled.

     First, the reasons for a buffer. I've read that highway engineers usually try to establish speed limits based on the 85th percentile of free traffic flow, meaning the speed at or below which 85% of vehicles are travelling. Although vehicles may vary in their performance and individual drivers vary in their skill and tolerance of risk, taken in the aggregate they can give a pretty fair idea of what people can handle safely and comfortably. I imagine they probably set the actual limit a little bit below that point (perhaps they just round down to the nearest 10 km/h), which would make sense because traffic flows most efficiently when everyone is going close to the same speed, and if only 15% of drivers feel comfortable at or above the posted limit, you'll likely have a lot of people going considerably slower and gumming up the works. So the optimum limit should be something a clear majority of drivers can confidently handle.
     But there's a curious fact about posted limits, which grocery store owners understand. Put up a sign that says "Limit 5 per customer", and people who normally would only have bought one will buy four more. To some extent, the same psychology applies to speed limits, and so drivers who might otherwise have been content at 48 km/h will feel they're missing out on something of value if they don't snap up those extra 12 klicks. So even if they do set the limit at the 85th percentile, it seems likely that the general flow of traffic will usually be at or near the speed limit, which is, after all, a good thing: we want everybody to be going approximately the same speed.
     Now, posted limits are one thing, but the facts of driving are such that sometimes you need to adjust your speed upward or downward in order to make certain maneuvers, such as getting into position to change lanes. Ideally, to avoid exceeding the limit, you'd just slow down and drop back behind the car next to you so you can change lanes, but in practice that's not aways the safest or best choice (especially given the prevalence of tailgating). So occasionally going a few klicks over the posted limit is a perfectly reasonable thing to do for certain maneuvers, and ought not to be discouraged when it's done responsibly in that kind of context. Moreover, I'd be willing to bet that traffic engineers who prescribe a speed limit are building into it assumptions that normal traffic flow will include such minor incidental variations around that value.
     As well, there's the scarcity of attention; a driver has only so much of it, and we want drivers to focus their attention where it is needed most. Although they shouldn't completely ignore the speedometer, micromanaging it is not a good investment of attention, either. A too-rigidly enforced speed limit without any buffer will begin to punish drivers for the wrong thing: watching the road. You could argue that to avoid this problem, you can just set your speed around 5 klicks below the posted limit to leave yourself some wiggle room, and of course that's true. However, remember the "Limit 5 per customer" phenomenon, and the fact that traffic engineers almost certainly take this into account when setting limits in the first place. It's likely that when they post a limit of 80 km/h, they expect and intend for traffic to comply by driving at 80 km/h and not 75 km/h.

     And yet, speed limits are legal limits; if you exceed them, you are breaking the law. If you build into it a formal buffer of 10 km/h, then in effect you're really just raising the "actual" speed limit by that amount. So what to do?

     One of the advantages to a live traffic cop pulling you over is that he or she has some discretion to let you go with a warning, when a warning is sufficient and effective. Why not have photo radar do the same thing? When it catches you exceeding the limit by 10 km/h or less, it would send you not a summons, but just a warning that you've been caught speeding. There would be no penalty, but if you get into the habit (that is, if you get too many warnings within a reasonable time period), you will start being fined.
     Mayor Iveson explained, in his blog, that the proceeds from photo radar do not go into general revenue but are used to fund traffic safety initiatives, so it seems to me that this would fall right within that mandate. The infrastructure for processing such cautions is already in place, so this would be a cost-effective way of delivering a message to exactly the people who need to hear it.

Tuesday, 16 September 2014

A Half-Baked Idea for Patent Extraction Rights

     I have written before about my disdain for patent law and the notion of intellectual property in general, but today I thought I'd share an idea I had a few years ago while thinking about the issue of patenting living organisms, which yesterday's post reminded me of. The idea is to create a new kind of property right which would hopefully establish an economic interest in maintaining biodiversity while encouraging basic research.

    But first, let me start with mineral rights, at least as they are handled here in Alberta. When you own land here, you do not actually own the rights to the minerals under it. Those belong to the Crown, which is one of the ways our government generates income, by charging royalties to the companies that want to drill for oil. That doesn't completely cut out the landowner, though, because to get to those minerals, you usually need to go through the landowner's property, and that often involves a fee.
     Now, this got me to thinking about a possible structure for biological patent rights. Under the current system, you go out and do some research and when you find something novel and useful about some organism, you can apply for a patent and there you go. It's as if an oil company could just go out and look for oil wherever they wanted, and then file a claim for the exclusive right to drill when they find it, without ever having to deal with landowners.
     So what if there were the genomic equivalent of a landowner, someone who owned not patents on an organism or its DNA, but the right to apply for such patents? So, for example, suppose I own the patent extraction rights for the genus Taraxacum, and the various species of dandelion. I don't necessarily own any actual dandelions, just the right to apply for patents on them. Then, if some pharmaceutical researcher discovers a medically useful protein in a dandelion leaf, and wants to patent it to bring a profitable new drug to market, they need to talk to me and work out a licensing arrangement: I will license them to apply for the patent in exchange for a flat fee, or a share of their profits, or whatever we agree on.

     What's the point of this? Well, the owner of the patent extraction rights would be economically motivated to do two important things: conservation and research. If I own the patent extraction rights for Taraxacum, I can now demonstrate an economic interest in preserving the species, which means I can have standing to sue someone who puts them at risk, and claim real damages. This internalizes an externality, as the economists say. Secondly, it's now in my interest to do and publish basic science about Taraxacum, because it boosts the chances that someone out there will recognize a patentable use for the plant, which could turn into a lucrative license arrangement for me.
     Consider also the issue of indigenous peoples and their traditional lore about the plants they've used for generations. At present, a scientist can go learn from the locals how they use this plant to treat this disease, take a few specimens back to the lab and reap the benefits of a patent on it, even though most of the actual work in discovering the plant's use was done by someone else. But if the patent extraction rights for these species were vested in the indigenous peoples themselves, they would have a way to share in the profits derived from their knowledge, as well as a justiciable property right in preserving their ecosystem.
     Arguably, the patent extraction rights to the human genome should be vested in the Crown on behalf of all humanity, and used to ensure that all patents on life-saving therapies are licensed on terms that do not exclude any humans who need the therapy.

     So there is my crazy half-baked idea, thrown out there for all the world to consider. Please accept my invitation to criticize it mercilessly in the comments below.

Sunday, 14 September 2014

Ignorance of the Law is no Excuse: Refuting Another Paranoid Chain Letter

     Yet again I find myself responding to one of the inane Facebook memes that appears in my feed. The text of this one reads:

Why did the US government
invent and patent EBOLA
Patent number #CA2741523A1
Patent number #8124101
The AIDS cure
Patent number #5676977
The CANCER cure
Patent number #6630507
Seems like they are trying to
cause an epidemic, making us Ill,
then keeping us sick...

     Wow. So much wrong. Let's start, first, with ignorance of the law. Patents are a form of intellectual property designed to encourage inventors to come up with new stuff. See, the problem with inventing is that if you have a great new idea that makes people's lives better, the only way to keep other people from using that idea is by not telling anyone about it, which kind of makes it hard to make money by inventing. You can maybe make things using your idea and sell them, but if you do that there's a good chance someone else will figure out how you did it, and then who'll buy from you? And even if you do manage to keep your method a secret, when you die it's lost, which is good for nobody.
     So patents are kind of temporary legal monopoly on new ideas. In exchange for filing an application with the patent office, which includes a complete explanation of the invention and how it works, you gain the exclusive right to use the idea for twenty years. (This varies with jurisdiction and is sometimes amended by statute, but the exact length of time doesn't matter for this explanation.) If someone else uses  your idea during this time, you can sue them, and of course the fact that you've published a patent means it's fairly easy in principle to establish whether or not they actually used your method or came up with some other process. (It doesn't matter if they independently came up with your method all by themselves; the fact that you were the first to patent it gives you the legal monopoly, and too bad for them.) So you have 20 years to make as much money as you can from your brilliant idea, and then the patent expires and anyone can use it without having to pay you anything.

     What does this mean for patents on EBOLA, SWINE FLU, The AIDS cure and The CANCER cure? Well, first of all, it means that all of these patents are by definition public knowledge. When you patent something, you tell everyone else how to do it so they can do it for themselves when the patent expires. If you had a bioweapon form of Ebola virus or swine flu, the very last thing you'd want to do is patent it. You'd want to keep it as secret as secret can be. So the fact that someone has patented these things means it's completely ridiculous that they're planning on using them to make us sick. I think patents are an inefficient kludge that may cause more harm than good, but the basic principle of what a patent is kind of makes it impossible for them to be evidence of a grand plot by the evil gubmint to make us all sick.

     Okay, so maybe the author of this forward didn't know what patents are and how they work. Lots of people don't, and that's okay. But that doesn't excuse the sheer idiocy of their paranoid rantings. I mean, if you're going to make claims about patents and what they mean, the least you could do is go and look up the patent itself. Let's do that now.

Ebola: Ebola virus causes a nasty and very frequently deadly hemorrhagic fever that's killed nearly 2,000 people in the 2014 outbreak in West Africa. It's scary, to be sure, but scientists studying it tell us that it doesn't actually spread all that easily and we shouldn't be panicking. Scientists at the Centers for Disease Control have managed to isolate and characterize specimens of the virus, and as often happens, they've taken out a patent on it. (A patent doesn't mean they invented the virus; it just means they claim to have discovered its genome in a meaningful way so as to make further inventions, such as a vaccine, possible.)
     A lot of labs, including those at the CDC, routinely file for patents on things they find that could be economically useful. That doesn't mean they plan to make money off it, though. Bear in mind that the job of the CDC is to control the spread of disease, a task they might find considerably harder and more costly if some big drug company manages to patent a treatment. So by pre-emptively patenting the virus itself, any cure based on the virus will be subject to the CDC's patent rights, so the CDC can negotiate with whatever private company finds a cure, in order to keep them from charging unreasonable prices for it.  So, I am not in the least bit worried about the fact that the CDC might hold a patent on the Ebola virus, although I am still more than a little uncomfortable about the idea of patenting life-forms. But more on that in another post.

Swine Flu: Swine flu was not invented by anyone, but patent 8124101 is for a genetically modified version of the naturally-occuring virus which was developed to improve the efficiency of preparing flu vaccines. I, for one, think that flu vaccines are a splendid idea, and I get mine every year, courtesy of Alberta Health Care. While I don't have to pay out of pocket for the vaccine, my government does, so I'm really rather pleased to learn that this patent was assigned by its inventors to Mount Sinai School of Medicine, St. Jude Children's Research Hospital, and the United States of America through the Secretary of Agriculture, and not some for-profit pharmacy corporation. 

AIDS: Another thing to remember about patents is that the invention doesn't actually have to work to be patented. Patent 5676977 is titled "Method of curing AIDS with tetrasilver tetroxide molecular crystal devices", which sounds awesome until you realize that being able to kill HIV in a test tube isn't necessarily all that helpful for curing AIDS. You can kill the virus by boiling it in chicken fat, too, but that's not a very helpful discovery when the virus you're trying to kill is lurking within the living cells of a human patient.
     Two more crucial details about this patent. First, it's not held by the U.S. government at all, but by Antelmen Technologies Ltd. of Providence, Rhode Island. Presumably Antelman hoped the discovery would be profitable, and I don't know, maybe it has been. But that's kind of moot, because the patent was filed May 31, 1996, which means that it's pretty close to expiry, at which point it becomes fair game for anyone to start making molecular crystal devices with tetrasilver tetroxide and go cure AIDS with it all they want. 

Cancer: Oh, man, this one annoys me. See, I'm not an oncologist or a microbiologist, so I'm by no means an expert, but I have undergone successful (so far) surgery and chemotherapy for a Stage III cancer, and I've learned just enough about cancer and how it's treated to be able to recognize when someone knows less than I do.  Talk about a cancer cure is dangerous nonsense, because cancer isn't a simple, single disease. It's a whole category of diseases which have one thing in common: cells dividing when they're not supposed to. The human body has hundreds of different types of cells, some of which are supposed to divide and some of which aren't, and there are thousands and thousands of ways their DNA can get screwed up to produce a cancer-type disease. Some of them can be cured, some of them cure themselves, and some of them will kill you dead. We're learning lots about how cells work, and amazing progress has been made (hey, I'm alive, in case you hadn't noticed), and maybe we'll have cures for all of them some day, but anyone who says there is "A cure for cancer!" is smoking something.
     And I mean that literally. Lately I've seen a lot of talk about cannabis as a cure for cancer, usually from people who are enthusiastic about marijuana. Now, personally, I'm all for decriminalizing pot, mainly for philosophical reasons (I've never tried the stuff, myself, and was never tempted to, even when I was on chemotherapy), and I think it's probably very useful medicinally, especially for cancer patients. It's supposed to be good for suppressing nausea, for one thing, and I can attest that chemo can really get you puking. It may even be effective for directly treating some cancers.
     But, as I said, there is almost certainly no such thing as A cure for cancer, and I strongly suspect that some people are vastly inflating the promise of cannabinoid drugs for the ulterior motive of Freeing The Weed. And indeed, that seems likely if you actually read patent 6630507, for "Cannabinoids as antioxidants and neuroprotectants". It's not a "cure for cancer"; it's potentially a treatment for a particular set of conditions which are sometimes associated with cancers.
     And yes, the patent is assigned to the U.S. Department of Health and Human Services. What does this mean? Not much, as long as cannabis remains illegal, making research into its properties inconvenient at best. Maybe the evil gubmint is holding onto the patent so it can sue stoners for patent infringement if the weed is freed? Doubtful, but I have heard that one of the side effects of marijuana use is paranoia.

     Explains a lot, actually.