This question has a basis in what I would call theoretical and metaphysical computer science. Naturally, it would not be welcome on CS SE. Hopefully it fits here and there are those of you here interested enough in both philosophy and computers to answer.
I have asked a question here related to the possibility of our world being a computer simulation, which received an interesting answer in response.
As explained in answers to this programming question (bear with me), in order to achieve the simulation of simultaneous actions in any computer simulation, (in computers, things are processed one after the other, never at the same time) one must observe actions in a series of ticks, each tick representing the smallest unit of time in the simulation. This, I think, is a fairly common concept.
So, the relevance? I'm curious to know:
A) Whether we could ever observe or measure the existence of a limitation in time divisibility (tick) - this part is possibly just a physics question, perhaps not even metaphysical, but it's pertinent to the real question:
B) If we can measure one (or rather the absence of one, should it not exist), would the absence of a smallest divisible unit (meaning time is infinitely divisible) disprove the theory of the universe being a computer simulation?
This seems to me like a fairly challenging question.