“If it was so, it might be; and if it were so, it would be; but as it isn’t, it ain’t. That’s logic.”
―Lewis Carroll, Through the Looking-Glass
Imagine life in an ancient world. You are a hunter-gatherer. Sometimes your food consists of an animal you managed to hunt and kill, but other times it might be foraged fruits, nuts, and vegetables. Every day might bring forth a new plant, or a new mineral for you to eat. But how do you know what will provide sustenance, and what might poison and kill you and your ...
