I was doing a jigsaw puzzle the other day, and it got me to thinking. What is a jigsaw? What would happen if you tried to cut down a tree with a jigsaw? Would you get strange shapes of logs that interlock if you match them up correctly? What if you switched a lumberjack's saw with a jigsaw? Would he be really confused, or would he immediately recognize the jigsaw from his days making Lincoln logs? You see, when you are doing a jigsaw puzzle, you have plenty of time to think of stupid questions.