Is the universe discrete or continuous?

What proof is there that the universe is discrete and what proof is there that the universe is continuous?

You can never know if the universe is discrete for certain since even if it appears so there may still be some undetectable phenomena you are unaware of.

You can never find evidence to suggest the universe is continuous as there can never be a scientific instrument capable of infinite accuracy.

it's interesting how this thread has turned into a debate on string theory, because it actually has a lot to do with what i was getting at earlier.

I'm no expert on string theory or mathematics, but hear me out.

Let us just simply ignore the question of whether or not string theory has any predictive ability and just assume that it doesn't.

Let us also assume that the theory is TRUE.

Now it doesn't have any predictive ability, but it's true.

I think we can then divide people into two camps: those who would think that string theory is useless because it can't predict anything, and those who would see it as totally meaningful because it IS True Knowledge.

I'm a mathematical realist, so i guess this won't apply to everyone, but maybe mathematics has given us the ability to prove a theory that would otherwise be unprovable within the system of our physical universe since mathematics is a 'bigger box' that encompasses the whole of our physical world.

I think that anything that is TRUE is meaningful, regardless of it's utility to man, just by virtue of it being true.

However, this is all a hypothetical, because i firmly believe that if string theory holds consistent and all the kinks are worked out, it will have the ability to predict, we just aren't that far yet.