I didnt say "if and only if" -- this is a conceptual analysis condition which applies only under deductive analysis.
I am using science, ie., abduction, to compare a class of hypotheses.
P(CapacityToThink| DegradingPermutations, ModelDrawsFromHistoricalCases)
is much much much lower than,
P(-CapacityToThink| DegradingPermutations, ModelDrawsFromHistoricalCases)