However, Watson isn't human. He, or rather it, is a machine, a wonder of technology made by researchers at IBM. In the game, Watson used math to decide on an answer. When a question was read out, Watson was immediately given the same question in electronic form. It analyzed the question and searched its memory bank-about the same as one million books of information-for possible answers. It then narrow the options down to one answer. If Watson felt around 75 percent confident about the answer, it would answer the question