Raymond Smullyan, Puzzle-Creating Logician, Dies at 97

By RICHARD SANDOMIR from NYT U.S. http://ift.tt/2l0GPc8
via IFTTTWhether it was in books or in conversation, Mr. Smullyan had a knack for adding a dash of whimsy to the logic puzzles he devised. February 11, 2017 at 12:00AM