These responsibilities, which were rewarded by a CBE in 1952 and a knighthood in 1956, and
his famously slow working methods restricted Coldstream's production to three or four paintings a year.
He argues, most
famously in «Thinking, Fast and
Slow», a 2011 book popularising his
work, that the mind (human, that is, not gorilla) incorporates two systems: an intuitive «system one», which makes many decisions automatically, and a calculating but lazy «system two», which rationalises system one's ideas and sometimes overrules them.