Yikes. A ranty postivist article in this week’s Guardian Life supplement: “Believe in facts not fads”, says Dick Taverne. Taverne argues that the public (bless ‘em) have diverged away from scientific fact in favour of “fads” like homeopathy and organic food.
The word “fact” gets bandied about a lot in this article as if that’s what science is all about. But science is not about “facts” as such. Science is concerned about theory. Theories in science are more strictly defined than in life, what is often called a theory in a normal context is more like a hypothesis, backed up with no evidence; a scientific theory has to have some “proof”, via evidence and observations to back it up. But proof does not mean truth. The evidence, the means of gathering it, and whether the proof is conclusive, are subject to dispute and disagreement about whether they accurately reflect what’s happening.
(It’s a wonder anything gets done in science, once you actually start to investigate how science is actually carried out - I’m reminded of the quote attributed to Niels Bohr about science being like the washing up - dirty plates, dirty water, dirty dishcloth, and yet out of it we get nice clean plates - it’s almost like magic).
Anyway, after having a go at the usual target of homeopathy, he plumps for organic food, which he says has no scientific evidence for benefiting human health, and therefore the public are being fooled. This is only partially true - there is evidence showing organic produce has higher levels of vitamins and minerals essential to health, and fewer toxic pesticides; what is disputed is whether they actually do make you healthier. Pro-organic people will say of course it makes you healthier as it naturally follows, while the sceptics will wait for conclusive (in their minds) evidence that definitely linking organic produce and wellbeing (proving anything is good for you to others’ satisfaction is pretty hard, as there are so many other mitigating factors such as environment and lifestyle - this is why the Daily Mail will permanently flip-flop between “Will tomatoes kill you?” and “Could tomatoes save your life?” every other day).
Taverne asserts that as there is no proof organic food is better for you, then it’s a fact that conventional foods are equally good. Through this leap of logic, he is denying scientific knowledge’s disputable nature; ironically, he does so by taking advantage of its disputability and amiguity and interpreting it as he sees fit. By doing this, he becomes as dogmatic as those he decries.
To be fair, this accusation can be levelled at both sides of the debate, and indeed any debate where cutting-edge science is involved - GM organisms, global warming, the origins of the universe, etc. By focusing on the “science” as if it was “fact”, a separate discipline of pure truth, that neatly rises above other less “rational” concerns, ignores the wider contexts of science. Science and politics are inevitably bound together in a modern society - decisions are often made with both, and other interests, in mind. Under his logic, people who buy organic food are irrational fools, even if they do so because they like the taste, or don’t want the countryside covered in pesticides; those who destroy trial crops of GM plants are scientific philistines without reason, even if they are concerned about the economic & moral implications of seed patents.
Taverne blames past crises in science such as BSE on the “government experts”, as if politics somehow contaminated the purity of science; in fact at the time what caused BSE was openly disputed, by both government and independent scientists. Ten years later, the link between BSE and vCJD was pretty thin and open to question. There never was a straight answer, a single truth that got covered up or corrupted.
If scientists cannot agree amongst themselves about what the right answer is, how can they possibly expect the public to either? Before bemoaning the poor “public understanding of science”, a little introspection into “science’s understanding of science” would be helpful.
I hope I’m not boring/baffling too many readers with all these recent treatises on the sociology of science and technology. I can go back to posting links to b3ta and BoingBoing if you like.
Seriously, feedback on what I wrote is welcome. I would like to provide hyperlinks to some of the claims above, but they’re mostly out of journal articles I’ve read and are not publicly accessible on the interweb - I’ll try and update the above article with some links if & when I can find them. Right, back to the essay writing…