"In so far as such a theory is empirically correct it will also tell us what empirical facts it should be possible to observe in a given set of circumstances"

This quote by Talcott Parsons suggests that a theory should be empirically correct in order to be useful. This means that the theory should be based on evidence and facts that can be observed in the real world. In other words, the theory should be able to predict what will happen in a given set of circumstances. This implies that the theory should be tested and verified in order to be accepted as valid. Furthermore, the theory should be able to explain the observed facts and provide a logical explanation for them. This quote emphasizes the importance of empirical evidence in the development of a valid theory. It suggests that a theory should be able to explain the observed facts and provide a logical explanation for them in order to be accepted as valid.