He speaks of a private conversation between Friar Airth and Major (about 1534), and names some of the persons present at a sermon in the parish church of St.Andrews, as if he had himself been in the congregation.

He gives the text and heads of the discourse, including "merry tales" told by the Friar.

{6} If Knox heard the sermons and stories of clerical scandals at St.Andrews, they did not prevent him from taking orders.

His Greek and Hebrew, what there was of them, Knox must have acquired in later life, at least we never learn that he was taught by the famous George Wishart, who, about that time, gave Greek lectures at Montrose.
The Catholic opponents of Knox naturally told scandalous anecdotes concerning his youth.

These are destitute of evidence: about his youth we know nothing.