19. What is NOT the criteria of a science (scientific theory)? a)It makes testable predictions b)It is based on authority c) It unifies already existing ideas d)It is logically consistent (consistent with what we already know) e)It is systematic f)It can be empirically proved.

The correct answer is b) It is based on authority.<br /><br />A scientific theory is not based on authority. Instead, it is based on empirical evidence, logical reasoning, and testable predictions. Scientific theories are developed through a rigorous process of observation, experimentation, and analysis, and they must be supported by evidence and logical consistency. Authority or personal opinions do not determine the validity of a scientific theory.