mathematics and the Democratic primary election: quantifying "mathematically impossible"

I've been really annoyed recently by the abuse of the phrase "mathematically impossible" in the popular press to describe the likelihood of either of the following:

(a) either candidate gaining the support of at least 2025 delegates (pledged or super)...
(b) Senator Clinton gaining the support of more pledged delegates than Senator Obama...

...by the time the primaries are over (but before the convention).

In short: neither of these are "impossible". Highly unlikely, maybe. But calling it "mathematically impossible" is simply ridiculous.

( math geeking )