Oblers' paradox https://en.wikipedia.org/wiki/Olbers%27_paradox notes that a (relatively) dark night sky seems inconsistent with the idea of an infinite and eternal universe, where one would expect that the sky would appear uniformly bright. This led to people questioning whether the universe really is infinite or eternal. There are other similar paradoxes in other domains, and in each of them, the puzzling thing is that we expect a certain thing to be more prevalent than it actually is. Can you think of an analog in the tech or startup world?