Experience as a member of many committees in Cambridge and elsewhere has taught me the desirability of retiring before one has become too ‘ga-ga’ to realize just how ‘ga-ga’ one is becoming. I am now approaching the end of my 83rd year, and prudence and laziness combine in advising me not to expose myself further in print.

C. D. Broad, ‘Preface’, in David Cheney (ed.), Broad’s Critical Essays in Moral Philosophy, New York, 1971, p. 15