Based on not being able to prove a negative. Just because it hasn't been done, doesn't mean it won't, or can't.

You are relying too much on the definition of what thermodynamics says cannot be done. You do not have to achieve 100% efficiency to have a machine that could possibly outlive our entire human race. This hypothetical machine would also not have to be friction-free given that more energy is created than being put in. It would only need to create enough efficiency to create more energy than is put in, not to become 100% effective and efficient.

[quote][16:04] jamer123: GRRR firefox just like quit on me now on internet exploder[quote]
...
[quote=!King_Amazon!]notices he's 3 inches shorter than her son and he's circumcised [quote]