is a specific kind of: expert.

is a broader term that covers: dialectician | syllogiser, syllogist, syllogizer | symbolic logician.

instances of which are: Jevons, William Stanley Jevons | Charles Peirce, Charles Sanders Peirce, Peirce | Quine, W. V. Quine, Willard Van Orman Quine | Bertrand Arthur William Russell, Bertrand Russell, Earl Russell, Russell | John Venn, Venn.

derivation: logic, logical system, system of logic | logic.