[mey]

To be safe you need to do everything 3 times and call a vote. Typically with 3 complete systems of identical nature.

[pyre]

Well, once you've done it twice and the results don't match you'll probably re-run it a third time. It wouldn't make sense to just choose the result that 'makes sense' at that point.

[btilly]

OK, you run it twice and the results differ. You go back and look at what the starting state should be and the starting states differ. Where do you get the definitely correct data from for the third run?