Our Daily Bread

A friend and I conducted an experiment. First I cut a length of cotton thread and knotted the ends together to make a loop. Then my friend held up both index fingers. I slipped the thread over them, he pulled them apart, and the thread broke quite easily. Next we knotted two strands together. These also broke, but it took more effort. However, three strands knotted together couldn’t be broken without cutting into his skin.