[ratmice]

I wish he had just said 50 years of LCF, since he even mentions automath in the article but that was but that was late 60s

[robinzfc]

Yes, 50 years of LCF would have been much better. You should not talk about "50 years of proof assistants" and not mention Mizar which had the largest library of theorems for about half of that time.