when you think about watson's spaoez and reflections on the jeopardy buzzer. it's hard -- it's hard to have reflections as precise as a computer. jon: that's unfair because you have to make your thumb work and how does watson do it. >> the thing is watson is a robot, he has a mechanical thumb that buzzes, i can hear a clicking on the buzzer every time it tries to buzz, so a creepy robot sound next to the podium. jenna: and watson tried to make small talk during a commercial. >> small talk is low. he's not really an extrovert. jenna: does the computer make any mistakes, are there mistakes to be had from a supercomputer? >> it can't makemental mistakes, it has no psychology, you can't confuse it or trick it or get it frustrated but it will -- it doesn't understand the questions that well, it got jaime efoxx and ludbi -- ludwig beethoven confused.