To rhetoricians, Antirrhetic speech for rhetoric, a learning that over time acquired the status of science. To geometers, Sextus criticizes the fact that geometers take as given the principles of their science. To mathematicians, the speech that serves as a criterion of truth and participates in the power of number. To astrologers, Sextus' antirrhetic speech against this practice not as a "learning" but as a "pseudoscience". To musicians, after referring to general perceptions of the value of music, Sextus formulates objections regarding its usefulness and corrective power, leading to questioning its necessity.