When someone asks you to pass the salt at the dinner table, you are able to understand the request even if it is asked in a variety of different ways?

This behavior illustrates us that the meaning of an utterance, not the physical stimulus, is most important for predicting behavior. Even though the words that are used may vary, the meaning is the same. It is very important to people to know what is behavior they are acting to that they will be aware to the people around them.