It's not that hard you just can't say never and can't say always because tomorrow the world might change and it might all be different.
I know it is most of the time extremely far fedged, but they just wanted to prove that you can not prodict the future. so you should rely on what YOU personaly found out through your senses
Originally posted by SilverFighter
If memory serves me right........back in Philosophy class they use the example of dipping a straight (unbended) stick of wood into a puddle of water. The stick appears to bend but it isn't is our senses telling us that it actually is.
In my physics class, it is called the refraction of light. Because when light travels through a differetn medium, it slows down and bends.