[fjolthor]

I agree with this but for a different reason. No matter how much we discover, everything we find is still something in existence. No matter what force or object you are observing, you can't doubt that it exists at some level, in some way (whichever multiverse or reality it is).

This means that at some point, existence must have been started by something non-existent. Because we only comprehend cause-and-effect, we can't possibly find the origin in a provable way while researching from within existence.