The reasoning is usually divided into deductive reasoning and inductive reasoning. Deductive reasoning is based on some general principles and individual examples to reach new conclusions about the individual example. Inductive reasoning is based on a certain number of individual facts, abstract, generalize Some general principles. But a more precise statement is: deductive reasoning is inevitable reasoning, that is, the premise is true to ensure the conclusion is true; inductive reasoning is probabilistic reasoning, the premise only provides certain support related to the conclusion, the premise true conclusion may not true. The truest meaning of this passage is:. ['The reasoning is the science of studying individual and general relationships.', 'Deductive reasoning is necessary reasoning and the only reasoning method that can be used to guide practice.', 'This text summarizes the difference between deductive and inductive reasoning.', 'The reasoning is actually the main tool for humans to understand nature.']