All of these are contingent on the degree of certainty the available evidence allows us to have in the theories that predict these results. I don't think there's any degree of evidence that would make a 100% prediction rational. (To illustrate, consider independently the probabilities that all physicists are part of a conspiracy, supernatural entities exist and/or we live in a simulation.)

I realise this was probably meant flippantly, but there is a serious point to be made about confusing 'the best estimates based on our currently available knowledge and theory' and 'immutable laws of the universe.'