Answer: An NS can be turned into CS by using it with a UCS during the process of conditioning. We can tell that the NS is now a CS by determining whether the UCR is triggered by CS or not.
Explanation: Once a neutral stimulus is used with a conditioned stimulus, the subject treats both the stimulus as one in later instances. For example, during the course of conditioning, if a bell (neutral stimulus) is used with a piece of meat (unconditioned stimulus), the subject (in this case, a god) relates the both with each other and treats it as one.
