What evidence do you actually have that the past even happened - Any point in the past, anywhere? The only evidence of any weight people can propose is a physical evidence, and even that can have holes torn through it - You can take a person, put him in a square room and tell him that generations before, the room was circular until God turned the room into a square. That past never happened, but if you got this person to write a book about it and propagate a new civilisation, people would worship the changing of shape as a miracle of a powerful God... It's interesting. I'm just thinking now... It's like, what evidence do I actually have for being in work since 9am? I know my memory tells me I have been here since then, but Alzheimer's destroys peoples memories so that is hardly a concrete evidence. Even if I had written the time down upon arriving, that could have been fabricated...