Occam's Razor

I imagine most of you have heard of that, although I equally imagine that most of you are unsure as to precisely what it means.  Well, it's a problem-solving aid which basically means that the least complicated solution is probably the correct one.  It's named after William of Ockham, who was a 13th century English Franciscan friar and who is credited with saying "Frustra fit per plura quod potest fieri per pauciora" - it is futile to do with more things that which can be done with fewer. I'm sure he would be the first to agree that this wasn't his original thought.  Aristotle had come up with basically the same idea some thousand years earlier.  And to bring it up-to-date, today we have the KISS principle - Keep It Simple, Stupid.