A Sophist

1. One of a class of teachers of rhetoric, philosophy, and politics in ancient Greece. Sophist - Wikipedia
2. (loosely) A teacher who used plausible but fallacious reasoning.
3. (loosely, by extension) One who is captious, fallacious, or deceptive in argument.Synonym: logic chopper
4. (dated) Alternative form of sophister (“university student who has completed at least one year”)

Usage notes

• The meaning of "sophist" can vary depending on the time period to which one is referring. A sophist of the earliest period was a master in his art or craft who demonstrated (taught by example) his practical skill/learning in exchange for pay. Later sophists were providers of a well-rounded education intended to give pupils arete – "virtue, human excellence". By late antiquity, sophistḗs / sophistes tended to denote exclusively a skilled public speaker and/or teacher of rhetoric.^[1][2]