One distinguishing characteristic of primarily - though not exclusively - Tory politicians seems to be their reluctance to read and reflect, to be briefed and informed - whether it's Boris, Hunt, Davis (who spent was it around four hours if that in Brussels as Brexit Secretary), Williamson (was going to say Private Pike - but that's an insult to Pike), Raa-aargh-b, and of course Failing Grayling - you just wonder what we are paying these people for - most of whom would struggle to hold down a meaningful position in the public or private sectors. All have made successive gaffes and uninformed statements as well as cock-ups that would have provoked resignations before dismissals in previous eras.
The exchange between Will Self and the ironically named Mark Francois was very revealing on the intellectual level of the ERG:
https://www.bbc.co.uk/programmes/p072z3yr