Forget about string theory. Try to scientifically experiment with quantum physics. It's all based on probablilities. How can you get a repeat in an experiment when you can't predict the outcome and get the same one twice in a row?

But that in and of itself becomes the evidence that something else is at work, so you put a name on it and try (with mathematics) to explain it.

You don't have to test it again... you already had an answer. Now you are explaining the answer.

"Every time I shoot this particle at that paper, the chance of it going to left, or right of the slits, or going through both is 100%, because I cannot predict which slit it will choose with any accuracy on a sub atomic level for any one choice."