I've always called 'em "science weenies", but I suppose you could call them sciencaites (derived via latin *sciens*, present participle of *scire* "to know"; *-ca*, the nominative neuter plural of *-cus* "characteristic of, like, typical, pertaining to"; and the latin-derived suffix -*ite* "relating to following someone or something") with the effective meaning of "followers of something like knowledge". The biggest difficulty in arguing against these people is that they tend to be mental dullards of a sort - made so by the belief - and thus can't properly grok philosophical arguments - their belief; the meme; only lets them trust things that they *believe* can be measured, which is why they worship at the temple of the art of measurements to begin with. Short of finding a way to make them aware of the meme sitting in their head, it's often better to drive in a wedge counter-idea that you can work to pry the parasite out of their minds. In this, it might be possible to take advantage of the fact that the modern day sciecaite cult has taken on a distinctly "liberal" bent, and is thus busy choking on the meme of equality as well. They say that when the facts are on your side, you should bang on the facts (and if the tables try to turn on you, bang on the tables), so work the human biodiversity angle on this fool - get him to see the measurable differences between various groups of people, starting with ones more flattering to the cult's adopted worldview, and slowing tinging the pills ever redder with time. You can't attack the scientism meme directly this way, but eventually it'll become difficult for them to ignore that the high priests in the temple of the art of measurements are themselves mostly a collection of ideologically driven cultists who keep re-measuring the same things until they get the data they want, then you'll cut the knees off the offending idea and it hopefully won't get much further than that.