It's an intersting philosophical conversation. Take floating point for example. I just fired up a Python interpreter and did: >>> 0.3 * 3.0 0.8999999999999999

It's an intersting philosophical conversation. Take floating point for example. I just fired up a Python interpreter and did: >>> 0.3 * 3.0 0.8999999999999999 There's are a lot of areas of computer science that touch on these sorts of problems. And people love to do Wat! talks for all those fun edge cases where how computers work and how programming languages work run up against our expectations of what we expect to be correct.