Black holes are not five dimensional... where'd you get an idea like that? Unless the universe itself is five-dimensional...

If you are using "universe" to refer to our spacetime, it still doesn't work. The physical laws of the universe must be uniform. Communication between areas with different physical laws would be impossible, and thus we could not detect their existance, and therefore they do not exist.

Logic is inherently true, because truth is defined through logic
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