> 2) You can't visit any time before your time machine was built. I think this is a very strange assertion to make. I find it more likely that one of the follo

> 2) You can't visit any time before your time machine was built. I think this is a very strange assertion to make. I find it more likely that one of the following is true: 1) Time travel is not possible 2) We'll wipe ourselves our before we discover it