<span>Did you hear about the mathematician who wanted to make a fruit salad,s so he bought some apples and oranges and ordered pears.
Ordered pears under this context is a pun for ordered pairs, which explains that </span>the objects appear in the pair<span> is significant: the </span>ordered pair<span> (a, b)definitely different than </span><span>(b, a) unless a = b.</span>
