It's even a bigger problem if you're betting. If one side of a bet has a 100% probability, how do you pay the bet if the other side wins? The other side has no odds with which to calculate how much you'd win.
It's not 100%. It something like 99.99835%. So they would calculate the odds as 1/(1-.9999835). Or 1 in 60606 chance of missing the playoffs.
