Depends on what maths you use. In probability theory, in the limit vanishingly small probabilities are set to 0. If you have a unit square and pick 1 point within it and then someone else picks a point at random, the probability of it being the same point is 0 rather than being very small. That's the basis of continuous probability theory. Getting Carlton into the finals requires magical thinking rather than maths.
I'd reserve 'mathematically possible' for an unlikely run of wins & losses in the run to the finals.
I'd reserve 'mathematically possible' for an unlikely run of wins & losses in the run to the finals.