https://en.wikipedia.org/wiki/Sadiq_Khan
'He attended Fircroft Primary School and then Ernest Bevin School (now Ernest Bevin College), a local comprehensive. Khan studied science and mathematics at A-level, in the hope of eventually qualifying as a dentist. A teacher recommended that he read law, as he had an argumentative personality. The teacher's suggestion, along with the American television programme L.A. Law, inspired Khan to do so. He entered the University of North London to study law.'
'Before entering the House of Commons in 2005, Khan practised as a solicitor.
He completed the Law Society finals at the College of Law in Guildford. From 1994 to 1997, he was employed as a trainee solicitor and assistant solicitor and from 1997 to 2005, was a partner in the firm Christian Khan with Louise Christian'
Even before he'd studied for his A-Levels, he'd have known how to use punctuation.
But then, via his education, Sadiq Khan will have learned enough to eliminate ignorance. Thus his campaigning for LGBT rights prior to being elected Mayor of London; that was probably one of the factors in his being elected.
Yes. The way I see it, in a few years time ~TL;DR~ will have graduated from Burger Flipper to being in charge of Fries. That is if he learns how to ask customers if they want them, that is.