Because if B was just another word for, another way of talking about, A, then to imagine A existing but B not existing would be imagining A existing but-- well, B is just A--A not existing.

因为如果B只是,A的另一种表达方式,那么认为A存在而,B不存在就是认为A存在但,B,也就是A,却不存在

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