"When an old and distinguished person speaks to you, listen to him carefully and with respect – but do not believe him. Never put your trust in anything but your own intellect. Your elder, no matter whether he has gray hair or lost his hair, no matter whether he is a Nobel Laureate, may be wrong... So you must always be skeptical – always think for yourself." --Linus Pauling
Two quick notes.
Last year on the BBC radio program CHAIN REACTION, Alan Moore interviewed Brian Eno. I listened to it and was amazed, but you can read the transcript of the two geniuses engaged in conversation here. The 'giant man-eating spider' question remains a favorite.