> John is the fifth hammer. I didn't know what this meant. Apparently there is a legend that Pythagoras discovered harmony accidentally by overhearing four ham

> John is the fifth hammer. I didn't know what this meant. Apparently there is a legend that Pythagoras discovered harmony accidentally by overhearing four hammers working. Upon closer inspection of the forge, he also heard a fifth hammer that was discordant to the other four, so he discarded it. Search "Pythagorean Hammers" for multiple shaky retellings that don't always include the fifth hammer, and a book named after it.