NEW YORK — Raymond Smullyan, whose merry, agile mind led him to be a musician, a magician, a mathematician, and, most cunningly, a puzzle-creating logician, died Feb. 6 in Hudson, N.Y. He was 97. Dr.

Raymond Smullyan, who has died aged 97, was a magician, concert pianist, hippie and Taoist; he was also an accomplished logician, mathematician and professor of Philosophy at Indiana University ...

Smullyan's puzzles are like children's stories, but ones that push buttons in corners of your mind you never knew existed. Photo: iStock An IAS officer I knew had a younger colleague who would often ...