However,Watson isn't human.He, or rether 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 nerrowed the options down to one answer.If Watson felt around 75 percent confident about the answer,it would answer the question.