The law of excluded middle is one of the basic laws of thought, which underlies all demonstrations in the classical logic.

排中律是思维的基本规律之一，它构成古典逻辑中所有证明的基础。

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Material and logical implication coincide in the classical logic, however they do not coincide in every logics.

实质蕴涵与逻辑蕴涵在经典命题逻辑中是一致的，但是二者并不是在任何逻辑中都一致。

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Since the connection with the poker chips is established through classical conditioning, sooner or later by that logic the poker chips would lose their power to serve as reinforcers.

因为与扑克筹码有关的联结,是通过经典条件作用建立的，所以按照这种逻辑,扑克筹码迟早会失去强化物的作用。

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