He did say he did have one other student in his years who did do that. Had his PhD at 13.5.
Really? Forgive me for being sceptical, but that ought to have been noteworthy enough that it'd be documented, for example on Wikipedia's
page of child prodigies, but neither that nor Google find any trace for me. (The youngest I spotted on the Wikipedia page was Kim Ung-Yong who supposedly got a PhD in physics before 16, but even there the reference given doesn't actually support the claim, so who knows.)
Google found a highly suspicious note of a 7yo who supposedly got a PhD from the UK's Coventry University - not a leading light in research, why on earth you'd send an exceptionally promising child there for a PhD I have no idea, and I didn't find any info on what it was supposedly on!
Plenty of children are reported to have been
starting a PhD in their mid-teens, but that's a whole other thing: lots of those either take most of a decade to finish or never finish at all. This is not surprising: making a research contribution is a completely different thing from doing an undergraduate degree and requires a different set of skills. There's a lot to be said for the "do an undergraduate degree, then do another one" approach, I think.
Given this I'm not sure how much I trust your psychologist!
