Computers work at the speed of their clock and their fetch-interpret-execute cycle. Not even the traces between transistors propagate signals at the speed of light. For one thing, there is a little bit of capacitance. You change voltages on a signal path you have to charge it up, or discharge. So there's allowances for when the signal path has a valid signal. In fine, this article is written for the kind of people who think the Marvel Multiverse is a thing.