As a puzzlist, I often emphasize that many puzzles are solved simply by using common sense or what the American pragmatist philosopher Charles S, Peirce (1839-1914) called "practical logic." When we ...

Petal is on her way to a country fair, to sell some vintage kitchenware belonging to her good friend Gretel. As she walks along the River Biddle admiring the view, Petal trips on a pair of oars left ...

Think of the first two as A and B. One of them rows the other to the opposite shore. Whoever does the rowing gets tired, so make a note of that. After the first trip across, have the officer who ...