You seem to be implying I'm a liar while focusing on making factual claims in a intentionally biased way (you just saw, but omitted, relevant information b/c it doesn't help "your side", which is to attack me).

Your framing here is as dishonest, hostile, and unfair as usual: I did not claim to be a coauthor.

You are trying to attack informality as something bad or inferior, and trying to deny my status as a professional colleague of Deutsch who was involved with the book in a serious way. You are, despite the vagueness and hedging, factually mistaken about what you're suggesting. Being a PhD student under Deutsch would have been far worse – much less attention, involvement, etc. But you are dishonestly trying to confuse the issues by switching btwn arguing about formality itself (who cares? but you're using it as a proxy for other things) and actually talking about things that matter (quality, level of involvement, etc).