Synthesized answer
The provided passage does not contain enough information to answer what evidence the author provides. It only includes the title and an attribution. To answer this question, further text from "Plato's Crito" would be needed, specifically content that details arguments, statements, or observations made by the author or characters within the work.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: Socrates Refuses to Escape from Prison (from Plato's 'Crito')--Socrates and Euthydemus by Socrates