A huge part of speculative and imaginative literature, especially its genre variants, is that strange things happen. But another part of it is that many of these strange things are actually plausible or at least credible.

It is not strange for the crew of a starship to encounter strange new worlds in outer space. The universe is big enough and we are ignorant enough to allow for that possibility. What is strange is that it happens on a weekly basis.

It is not strange for a detective to solve a mystery using the most unlikely of observations. People can be smart. The strange bit is that the same detective manages to do it in every case, week after week.