Which is at least stated as if the quoted statement itself were a transhistorical truth. That is, the quoted statement, applied to itself, refutes itself. (Because if the statement itself is a transhistorical truth, then the statement itself is a counterexample to the claim of the statement. And if the statement itself is not a transhistorical truth, then there are transhistorical truths in other historical epochs and/or other fields of knowledge.)