Sophist
Part of speech: noun
Definition: One of a class of teachers of rhetoric, philosophy, and politics in ancient Greece, especially one who used fallacious but plausible reasoning. One who is captious, fallacious, or deceptive in argument.
Casuist
Part of speech: noun
Definition: a theologian or other person who resolves cases of conscience or moral dutysomeone who attempts to specify exact and precise rules for the direction of every circumstance of behaviorsomeone who argues over fine details; a quibbler or sophist