Agnostic: a pointless term?

[Pizza]

http://en.wikipedia.org/wiki/Probability

Probability is the measure of the likeliness that an event will occur.[1] Probability is quantified as a number between 0 and 1 (where 0 indicates impossibility and 1 indicates certainty).[2][3] The higher the probability of an event, the more certain we are that the event will occur. A simple example is the toss of a fair coin. Since the two outcomes are equally probable, the probability of "heads" equals the probability of "tails", so the probability is 1/2 (or 50%) chance of either "heads" or "tails".

http://en.wikipedia.org/wiki/Possibility

Possibility is the condition or fact of being possible. The Latin origins of the word hint at ability. Possibility also refers to something that "could happen", that is not precluded by the facts, but usually not probable. Impossible denotes that something cannot happen or be done.

I hope that makes my question clearer.