Eukleides is said to have composed six dialogues, the titles of which alone remain. The scanty information which we possess respecting him relates altogether to his negative logical procedure. Whether he deduced any consequences from his positive doctrine of the Transcendental Ens, Unum, Bonum, we do not know: but he, as Zeno had been before him,[25] was acute in exposing contradictions and difficulties in the positive doctrines of opponents. He was a citizen of Megara, where he is said to have harboured Plato and the other companions of Sokrates, when they retired for a time from Athens after the death of Sokrates. Living there as a teacher or debater on philosophy, he founded a school or succession of philosophers who were denominated _Megarici_. The title is as old as Aristotle, who both names them and criticises their doctrines.[26] None of their compositions are preserved. The earliest who becomes known to us is Eubulides, the contemporary and opponent of Aristotle; next Ichthyas, Apollonius, Diodôrus Kronus, Stilpon, Alexinus, between 340-260 B.C. [Footnote 25: Plato, Parmenides, p. 128 C, where Zeno represents himself as taking for his premisses the conclusions of opponents, to show that they led to absurd consequences. This seems what is meant, when Diogenes says about Eukleides--[Greek: tai=s a)podei/xesin e)ni/stato ou) kata\ lê/mmata, a)lla\ kat' e)piphora/n] (ii. 107); Deycks, De Megaricorum Doctrinâ, p. 34.] [Footnote 26: Aristot. Metaph. iv. p. 1046, b. 29. The sarcasm ascribed to Diogenes the Cynic implies that Eukleides was really known as the founder of a _school_--[Greek: kai\ tê\n me\n Eu)klei/dou scholê\n e)/lege cholê/n] (Diog. L. vi. 24)--the earliest mention (I apprehend) of the word [Greek: scholê\] in that sense.] With the Megaric philosophers there soon become confounded another succession, called Eleian or Eretrian, who trace their origin to another Sokratic man--Phædon. The chief Eretrians made known to us are Pleistanus, Menedêmus, Asklepiades. The second of the three acquired some reputation. [Side-note: Doctrines of Antisthenes and Aristippus--Ethical, not transcendental.]