Tisias studied under Corax in Syracuse, probably around 465 BC. Tisias was regarded as more prolific than his mentor by Aristotle. Like Corax, Tisias emphasized “probability” in rhetorical situations.
Corax may have been “the founder of rhetoric.” He taught in 466 BC and trained Tisias. They both emphasized the value of “probability” to law/court cases.
The name of is group of rhetorical scholars stems from sophistai, meaning “one who possesses wisdom.” They endeavored to show that there was no such thing as certainty, that knowledge was epistemic. Their timeline overlaps with the big names of Classical rhetoric; Aristotle, for example, was critical of the Sophists and their ideas. Based on the write up about them by Turner on the Catholic Encyclopedia, I wonder if the Sophists might be seen as constantly playing the devil’s advocate?
Noted Sophists include Protagoras, Gorgias, Hippias, and Prodicus.