Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it.
To boldly go where no one has gone before
The idea of 10 dimensions might sound exciting, but they would cause real problems if you forget where you parked your car.
The beatings will continue until morale improves.
We live in the most probable of all possible worlds.
It is not clear that intelligence has any long-term survival value.