I was recently given some of my late father's books, throughout which he’d made countless notes and annotations in the margins. Underlined (NB!), in a Karl Popper autobiography;
"But what impressed me most was Einstein's own clear statement that he would regard his theory as untenable if it should fail in certain tests”
“Here was an attitude utterly different from the dogmatic attitue of Marx, Freud, Adler…”
“This, I felt, was the true scientific attitude”



