We are indebted to Plato for his changing the word “sophist” to a term of contempt. As soon as we see a sophist enter a dialogue, we know he’s the one in a black hat, soon to be tangled in contradiction and an airtight refutation. This expectation detracts from our ability to learn from Plato. Maybe we should translate “sophist” as “Ph.D” or “professor”.
(…and then Professor Trasymachus, unable to contain himelf any longer, threw himself into the discussion…)
That would give us a better idea of what philosophy is all about.