Logic and Clear Thinking: 50 Brain Teazers

The great philosopher Ludwig Wittgenstein said ‘Logic is not a body of knowledge’. I would rather have it that logic is a clear way of thinking, of using knowledge. And that’s what you need to solve many puzzles and teasers. Some of the examples herein may have been around for some time in one form or another, but some are new. They are all designed to task little grey cells and to entertain.