Originally posted by FreakyKBH
You have failed to show how anyone's knowledge of anything in any way, shape or form alters the event. Does my knowledge of last year's Super Bowl winner--- either while watching the event unfold or after the fact--- impact the same?
Knowledge of past events does not affect them because a curious property of time is that information never travels backwards.
The critical factor is whether or not knowledge of the future can be used to affect the present thus changing the future and potentially the original knowledge leading to a time paradox.
If the knowledge cannot be used to impact the present, then the question is whether or not God can truly be said to know the future now - as his knowledge cannot be communicated to us or in fact to the present i.e. it is totally independent of the present and thus is not in the present.
The point is, my knowledge did nothing about the price, one way or another.
But it did affect the present and could have potentially affected the price. Sure you chose an example in which your knowledge did not and likely would not affect the price, but and example does not prove the rule.
If you had acted, and affected the price, it would have changed the future, thus changing your knowledge (or proven you to be fallible), thus changing your decision, thus causing a time paradox.