James suffers from alcohol use disorder and has repeatedly drank alcohol spiked with a nauseating drug. He has not developed an aversion to alcohol because he blames his nausea on the drug. This illustrates the importance of in classical conditioning.

...negative reinforcement..

Explanation:

In classical conditioning negative reinforcement is channeled such that such that it servers as an effective way to strengthen the desired behavior.

However, it is most effective when reinforcers are practicably leading with this behavior. Note that over a period , there will be an elapse between the behavior and the reinforcer, the feedback response wise is likely to be weaker.

It is used to help teach specific behaviors in short, with negative reinforcement, something uncontrollable, uncomfortable, unwelcome or unpleasant is taken away in response to a stimulus.

Over a period of time, the target behavior is inculcated and increase with the expectation that the unpleasant habits will be taken away. Healthcare studies this and adapt this to help improve the way of life of willing patients to a more healthy style.

Here we see that over a while James will stop this alcoholism as his stimuli of nausea would deter him.