[gavinlit]

Ok - Second law is coverd above.
Re Fact - You could argue there's no such thing as fact - just agreed understandings/observations/definitions that seem to work well for us in our observable lives. 'Facts' have a way of changing. To loosely plagiarise - "It was once a fact that the world was flat. It was once fact that heavier objects fell faster. It was once fact that certain humans were superior to others by divine decree " etc etc.

In maths we have we may have axioms, which is probably as close to fact as you're going to get (althought proven theories come close - if you ignore Godel) but I don't know that science has something similar. I'm happy to be corrected on this one.