Final answer:
Chad is likely experiencing taste aversion, which is a type of conditioning that helps organisms quickly learn to avoid harmful foods. Despite not causing illness, the negative emotional experience of disgust has conditioned Chad to be averse to roasted cauliflower in the future.
Step-by-step explanation:
Chad is likely experiencing taste aversion. Taste aversion is a type of conditioning in which an interval of several hours may pass between the conditioned stimulus (something ingested) and the unconditioned stimulus (nausea or illness). It is a learning mechanism that helps organisms quickly learn to avoid harmful foods.
In this case, Chad's initial disgust when presented with roasted cauliflower paired with the subsequent increasingly intense emotional aversion to the dish is a classic example of taste aversion. Even though the roasted cauliflower didn't make him sick, the negative emotional experience has conditioned him to be averse to it in the future.