Originally Posted by JoeGoldfarb
in order to due so, a great deal of information about you and your environment will be required to determine the outcome.
The process of acquiring the information itself changes the outcome. That is the difficulty of the pre-determinism argument.
It is like conducting a survey to find out whether people are in favour of a particular government policy or not. As you ask your survey questions, the survey respondent is forced to think about your questions. It is possible that this thinking itself will cause a change in the respondent's opinion of the policy.
In fact, the more questions you ask, and the more detailed the answers you demand, the more likely you will cause a change in the respondent's opinion.