As an academic discipline, logic is the study of reasoning. Logic puzzles, therefore, involve making a series of inferences ...

The twentieth-century philosopher Ludwig Wittgenstein once wrote that: “Logic takes care of itself; all we have to do is to look and see how it does it.” These words bring out the crux of the problem ...

When Slate asked me to write about “sudoku”—the number puzzle that’s taken Britain by storm (and seems poised to conquer the United States, too)—I thought it might be a pleasant little assignment.

The twentieth-century philosopher Ludwig Wittgenstein once wrote that: “Logic takes care of itself; all we have to do is to look and see how it does it.” These words bring out the crux of the problem ...