人类思维的检验标准是实践 Human Ideas Must Be Tested and Verified By Practice 人脑的抽象思维与真实世界不存在的抽象维度 哪些是自然界不存的抽象维度？ Abstract Thinking:Ability and Trap人类思维的检验标准是实践 Human Ideas Must Be Tested and Verified By Practice 哪些是自然界不存的抽象维度？ 人脑的抽象思维与真实世界不存在的抽象维度 Abstract Thinking: Ability and Trap