A sophist was a professional travelling teacher in ancient Greece in the fifth and fourth centuries BC. Sophists specialized in one or more subject areas, such as philosophy, rhetoric, music, athletic
Socrates was lampooned by Aristophanes in The Clouds as a pedantic wordsmith who lived in a basket. Later philosophers such as Plato and Xenophon sought to distinguish Socrates' ethical teachings from this comic portrayal of a sophist.
Isocrates, one of the later sophists, was critical of the education practices of his predecessors
Protagoras was a pre-Socratic Greek philosopher and rhetorical theorist. He is numbered as one of the sophists by Plato. In his dialogue Protagoras, Plato credits him with inventing the role of the pr
Sophist
…expertise predominantly to young statesmen and nobility. Certain sophists are regarded as philosophers in their own right. The first credited sophist, Protagoras, argued that "man is the measure of all things", and he controversially would strive to "make the weaker argument the stronger". The arts of the sophists…
Protagoras by Jusepe de Ribera, 1637
Democritus and Protagoras by Salvator Rosa; it is said that Protagoras was educated on philosophy by Democritus, but this is likely apocryphal.