"In that case, I have a proposal."

The spider said: "You open the box and throw the one I designated over. As long as I confirm that it is not fake, then the remaining three can be exchanged directly without checking!"

If it is a counterfeit, there is a high probability that four of them will be copied together. Of course, half-true and half-false, three true and one false, three false and one true are also possible operations, but the risk of probabilistic mistakes has been borne by the spider. If Ye more one really want to use'

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