You don't have to believe it, but you can't claim that it doesn't exist, because you haven't prove that it doesn't exist yet. In this case, claiming it doesn't exist at all (i.e. doesn't exist for anyone) is simply wrong, is not supported by any evidence, because you simply not able to prove that it doesn't exist for anyone. Just like if you have never see a black swan, you can't claim there is no black swan in this world.
【在 A*********l 的大作中提到】 : You don't have to believe it, but you can't claim that it doesn't exist, : because you haven't prove that it doesn't exist yet. In this case, claiming : it doesn't exist at all (i.e. doesn't exist for anyone) is simply wrong, is : not supported by any evidence, because you simply not able to prove that it : doesn't exist for anyone. : Just like if you have never see a black swan, you can't claim there is no : black swan in this world.
A*l
21 楼
En, this is what you have claimed: 练过气功的知道,可以想象"气"在体内运行。但是这只是大脑的臆想,并无"真气"