[1] Plato scholars Thomas Brickhouse and Nicholas D. Smith question the authenticity of that tradition, mainly on the grounds that the earliest extant sources of the story are comparatively late and that it is unmentioned by more reliable sources such as Plato, Xenophon, Aristophanes, or Aristotle.
[2] According to John Burnet, the earliest extant mention of Socrates as a statuary or stonemason is in Timon of Philius,[3] as quoted by Diogenes Laërtius 2.19.
Burnet claims that Timon "is a very unsafe authority for anything", and that the attribution "appears to have arisen from an almost certainly false interpretation of [Socrates'] references to Daedalus as the ancestor of his family" (in Plato's Nephropathy 11c, 15b).
[6] In direct contradiction to Plato's Crito 50d-e, one scholar of ancient Greek music has claimed that "Socrates received no training in mousikē in boyhood...", based on the assumption that "[h]is father, a stonemason, was typical of a class that did not receive a training in mousikē.
"[7] According to Plato (in the dialogue Laches), Sophroniscus was a close friend of Lysimachus, son of the illustrious Aristides the Just, which (presumably) allowed Socrates to become familiar with members of the circle of Pericles.