The First Book of Logical Exercises by Andreas Libavius

Philip's Dialectic is not criticized in itself, but its imperfection is argued.

the former description, which the never-sufficiently-praised man, Dr. PHILIP Melanchthon, having cast aside the spinous commentaries of the pseudo-peripatetics false Aristotelians—that is, the monks—and drawn from the sincere fountains of Aristotelian doctrine and the learned lucubrations of Rhodolphus Caesarius and others, he took care to propose to adolescents with such ease and perspicuity that not undeservedly has the light of logic seemed to have risen in our fatherland along with the Evangelical light. And so, since the studious were occupied with true precepts and illustrious things, having omitted unnecessary and frivolous trifles, not undeservedly did they become most learned; those most obscure sophists and useless triflers remained, which matter almost obtained the first rank for highest praise. But since nothing is simultaneously begun and perfected, and it is evident that the completion of the arts is not the labor of one man nor of one age; at that time the logical treatment was in a way more imperfect, which the labor and industry of many has hitherto rendered more absolute. You know yourself that once leavened bread was invented, men abstained from acorns, and we ought not to disparage the increments of the arts.

Answer to the objection.

Thus therefore answer those admirers of yours: We wish nothing to be detracted from anyone's reputation, but rather we admire the industry of previous times.