Zeno, Greek philosopher of the Eleatic school (q.v.), and who flourished in 500 B.C.; was the founder of the dialectic so successfully adopted by Socrates, which argues for a particular truth by demonstration of the absurdity that would follow from its denial, a process of argument known as the reductio ad absurdum.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Zenith * Zeno