I’ve written many posts and articles making the point that the political right, in most English speaking countries has been taken over by a tribalist post-truth politics in which all propositions, including the conclusions of scientific research, are assessed in terms of their consistency or otherwise with tribal prejudices and shibboleths.
Very occasionally, intellectuals affiliated with the political right (conservatives and libertarians) will seek to deny this, arguing that isolated instances are being blown out of proportion, and that the right as a whole is committed to reasoned, fact-based argument and acceptance of “inconvenient truths’ arising from the conclusions of scientific research, .
But, far more often their response takes the form of a tu quoque or, in the language of the schoolyard, “you’re another”. That is, they seek to argue that the left is just as tribalist and anti-science as the right. Favored examples of alleged left tribalism included any rhetoric directed at rightwing billionaires ( Murdoch, Rinehart the Kochs). The standard examples of alleged left anti-science are GMOs, nuclear power and anti-vaxerism, but it is also sometimes claimed that US Democrats are just as likely as Republicans to be creationists.
I’ll argue over the fold that these examples don’t work. What’s more important, though, is what the tu quoque argument says about those who deploy it, and their view of politics. The implied claim is that politics is inherently a matter of tribalism and emotion, and that there is no point in complaining about this. The only thing to do is to pick a side and stick to it. What passes for political argument is simply a matter of scoring debating points for your side and demolishing those of the others. So, anyone who uses tu quoque as a defence, rather than seeking to dissuade their own side from tribalist and anti-science rhetoric, deserves no more respect than the tribalists and science deniers themselves, who at least have the defence of ignorance.