Computers can drive cars, land a rover on Mars, and beat humans at Jeopardy. But do you ever wonder if thereís anything that a computer can never do? Computers are, of course, limited by their hardware. My smartphone canít double as an electric razor (yet). But thatís a physical limitation, one that we could overcome if we really wanted to. So let me be a little more precise in what I mean. What Iím asking is, are there any questions that a computer can never answer?