"But he need not--indeed, he must not--be fluent enough to assimilate all the data himself into a coherent alternative explanation. His point is that the truth is unknowable."
.../...
" So, while you might think [skeptic] is a hack mining the data for results that would conform to his political preferences, he has already made the same charge against the other side. Who can tell who's right?"

http://www.gnxp.com/blog/2007/01/anti-science-mad-libs.php

An amazing fit with your posted text!