[quote=Legend]
Still. When do you need to know bears among dogs and cats?
[/quote]

It's a question that's developing my algebraic reasoning. I don't ever need to know bears among dogs and cats, that's just what Khan chose to use as an example for reasoning. It's kind of ironic considering that the question is about reasoning and the situation defies all reason and logic. A pet store that sells cats, dogs, and [i]bears[/i].