Page "Critias (dialogue)" Paragraph 5

The latter group argues that there is too much distance of time between the oligarch Critias ( 460 – 403 BC ) and Solon ( 638 – 558 BC ), the famous lawmaker, who supposedly brought the Atlantis story from Egypt to Greece.

According to Plato, Solon told the story to the grandfather of the Critias appearing in this dialogue, who was also named Critias, and who retold the story to his grandson.

The latter group alleges that the tyrant's grandfather could not have both talked to Solon and still have been alive at the time the hypothetical discussion pictured in this dialogue was held.

Thus they assume that it is the tyrant's grandfather who appears in both Timaeus and Critias, and his own grandfather, who was told the Atlantis story by Solon.