18 September

Common sense is usually a terrible guide. For example, a telescope, or a zoom lens on a camera. Do they let us get to things 'far away'? Common sense says yes. But when you use a telescope or zoom lens, you don't move an inch from where you are. So whatever you're seeing, is right 'here' with you. Common sense says 'yes but it brings the image from over there, to here'. So now we have magical images moving through the air, courtesy of common sense.