By the current model it is impossible for anything to move faster than light*, but what is your confidence in the current model? Certainly high, but not infinite. Lets not mix up the map and the territory. As for running faster than light; certainly unlikely, but not infinitely so. If you define something as impossible in some model, and given that you want a probability within that model, or given that model, I don’t know what happens however...
By the current model it is impossible for anything to move faster than light*, but what is your confidence in the current model? Certainly high, but not infinite. Lets not mix up the map and the territory. As for running faster than light; certainly unlikely, but not infinitely so. If you define something as impossible in some model, and given that you want a probability within that model, or given that model, I don’t know what happens however...
*With certain complications.
[Edit: Formating]