Philosopher known for "reductio ad absurdum" arguments (4)

I believe the answer is:

zeno

(Other definitions for zeno that I've seen before include "Greek philosopher of Elea (paradoxes)" , "Stoical leader" , "Gr. philosopher (-'s paradoxes); zone (anag.)" , "Greek philosopher of paradox fame" , "Old mathematician" .)

I've seen this clue in the LA Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.