Normalizing probabilities

Jonas lies and hot tub is fixed (possible in math not possible in logic of scenario): .72, JL and NL: .08, JT and NF: .18, JT and NL .02. Add these four scenarios up .72+.08+.02+.18= and mathematically you get 1 or 100% the sum of all mathematically possible probabilities. However if logically .72 and .02 are not possible, we take these cases out by adding only the remaining probabilities that are logically possible, and dividing the probability of the situation we are specifically concerned with.