Have you ever noticed the remarkable number of contradictions in our language?

Here are a few:

Why is it called rush hour when that's when the traffic moves at its slowest?

Why do we put cups in the dishwasher and dishes in the cupboard?

How do you ever get off a non-stop flight?

A roadworks sign suggests that the road works when in fact it clearly doesn't.

If money doesn't grow on trees, why do banks have branches?

Why don't we call a fireman a waterman?