If you expect the unexpected, doesn’t that make the unexpected expected and the expected unexpected?

Just because you anticipate the unexpected doesn’t necessarily mean that you won’t be surprised when it occurs. To expect an event which is still unexpected connotes the element of surprise and an element lacking in comprehension.

Example: I may take an umbrella with me to work in case I require it to prevent becoming wet from an unexpected rainfall. But, nevertheless, use it to ward of a thief trying to steal my car.

In summary, life isn’t predictable. Although some things can be expected, many are not, and just because we anticipate an expected notion, it often does not imply that the unexpected cannot occur or that the former will either.