Question: What classical Greek philosopher credited as one of the founders of Western philosophy, was featured in the Socratic dialogue, The Symposium? 

<P0-S0> The Symposium (Greek: Συμπόσιον ) is a Socratic dialogue written by Xenophon in the late 360's B.C. <P0-S1>  In it, Socrates and a few of his companions attend a symposium (a lighthearted dinner party at which Greek aristocrats could have discussions and enjoy entertainment) hosted by Kallias for the young man Autolykos. <P0-S2>  Xenophon claims that he was present at the symposium, although this is disputed because he would have been too young to attend. <P0-S3>  The dramatic date for the "Symposium" is 422 B.C. <SEP> <P1-S0> Gorgias ( ; Greek: Γοργίας ) is a Socratic dialogue written by Plato around 380 BC. <P1-S1>  The dialogue depicts a conversation between Socrates and a small group of sophists (and other guests) at a dinner gathering. <P1-S2>  Socrates debates with the sophist seeking the true definition of rhetoric, attempting to pinpoint the essence of rhetoric and unveil the flaws of the sophistic oratory popular in Athens at the time. <P1-S3>  The art of persuasion was widely considered necessary for political and legal advantage in classical Athens, and rhetoricians promoted themselves as teachers of this fundamental skill. <P1-S4>  Some, like Gorgias, were foreigners attracted to Athens because of its reputation for intellectual and cultural sophistication. <P1-S5>  In the "Gorgias", Socrates argues that philosophy is an art, whereas rhetoric is a skill based on mere experience. <P1-S6>  To Socrates, most rhetoric is in practice merely flattery. <P1-S7>  In order to use rhetoric for good, rhetoric cannot exist alone; it must depend on philosophy to guide its morality, he argues. <P1-S8>  Socrates therefore believes that morality is not inherent in rhetoric and that without philosophy, rhetoric is simply used to persuade for personal gain. <P1-S9>  Socrates suggests that he is one of the few Athenians to practice true politics (521d). <SEP> <P2-S0> Socrates ( ; Greek: Σωκράτης , "Sōkrátēs"; 470/469 – 399 BC) was a classical Greek (Athenian) philosopher credited as one of the founders of Western philosophy. <P2-S1>  He is an enigmatic figure known chiefly through the accounts of classical writers, especially the writings of his students Plato and Xenophon and the plays of his contemporary Aristophanes. <P2-S2>  Plato's dialogues are among the most comprehensive accounts of Socrates to survive from antiquity, though it is unclear the degree to which Socrates himself is "hidden behind his 'best disciple', Plato". <SEP> <P3-S0> In ancient Greece, the symposium (Greek: συμπόσιον "symposion", from συμπίνειν "sympinein", "to drink together") was a part of a banquet that took place after the meal, when drinking for pleasure was accompanied by music, dancing, recitals, or conversation. <P3-S1>  Literary works that describe or take place at a symposium include two Socratic dialogues, Plato's "Symposium" and Xenophon's "Symposium", as well as a number of Greek poems such as the elegies of Theognis of Megara. <P3-S2>  Symposia are depicted in Greek and Etruscan art that shows similar scenes.