I've learned, that spatiotemporal neighborhood among the conditioned and the unconditioned stimuli is a presupposition of conditioning (classical or operant). A second presupposition is called contingency in my notes. The explanation is, that the CS has to predict the US with certainty. But in my opinion the meaning of the word contingency is quite the opposite of predictability with certainty (necessity). Why is the second presupposition called contingency?
Conditioning and Contingency
behaviorism;conditioning