Could you give an example of an equation "giving a wrong answer that is theoretically possible". In that case the equation would have remained true or accurate within its own theoretical model, and hence not broken down, but nonetheless be "wrong" for predictions not valid in reality. In that case the equation most definitely does not break down. Still, it makes for unsatisfying predictions. I will have to look up infinite probabilities. If that is "literal nonsense" but still within an otherwise valid equation could it not just be an issue with our model of understanding which cannot make sen