Imagine a bug crawling around on a sidewalk in New York City. Obviously, the bug doesn't comprehend the existence of NYC, but is that because NYC defies logic? It defies bug-logic, but not logic altogether.
There's no such thing as "bug-logic" or "human-logic" or "dolphin-logic," there is just logic.
Logic isn't something that we only think we know, or that we're only reasonably sure we know... logic is incorrigible, we
absolutely know logic and we
absolutely know that our knowledge of logic is absolute. (So on,
ad infinitum, since it's infinitely justified per its incorrigibility by definition).
Yes, there might exist things that we don't understand -- just like a bug probably doesn't understand NYC. I agree with that.
But we can absolutely know that anything that exists is logical. That is an absolute truth, infinitely justified, and impossible to doubt or object to -- because it's incorrigible. Even attempting to doubt it for the sake of argument only proves that it's true and self-contradicts.