chunk: One countering position, held by Hermogenes, is that names have come about due to custom and convention. They do not express the essence of their subject, so they can be swapped with something unrelated by the individuals or communities who use them.
  The line between the two perspectives is often blurred. During more than half of the dialogue, Socrates makes guesses at Hermogenes' request as to where names and words have come from. These include the names of the Olympian gods, personified deities, and many words that describe abstract concepts. He examines whether, for example, giving names of "streams" to Cronus and Rhea (Ροή – flow or space) are purely accidental.
  Don't you think he who gave to the ancestors of the other gods the names “Rhea” and “Cronus” had the same thought as Heracleitus? Do you think he gave both of them the names of streams (ῥευμάτων ὀνόματα) merely by chance?