 In the view of many social scientists, the more probable a theory is, the better it is, and if we have to choose between two theories which differ only in that one is probable and the other is improbable, then we should choose the former. Popper rejects this. Science values theories with a high informative content, because they possess a high predictive power and are consequently highly testable. For that reason, the more improbable a theory is the better it is scientifically, because the probability and informative content of a theory vary inversely—the higher the informative content of a theory the lower will be its probability. Thus, the statements which are of special interest to science are those with a high informative content and (consequentially) a low probability, which nevertheless come close to the truth. Informative content, which is in inverse proportion to probability, is in direct proportion to testability. As a result, the severity of the test to which a theory can be subjected, and by means of which it is falsified or corroborated, is of fundamental importance.