the fundamental tenet of PC is: "acknowledgement of facts or discussions which may lead one to a disfavored conclusion are prohibited"
e.g., not only is it taboo to state that a particular gender lacks a certain skill, but it is taboo even to argue whether it *might* be the case, independent of truth or obviousness. to raise the possibility is prohibited. even simply pointing to well-established facts without comment is not allowed if those facts lead to a disapproved conclusion.