现在唯一重要的是你们要理解，什么事演绎的有效论点，也就是真理保留，如果前提是真的，结论必定是真的。
The only that that is important now is that you understand what a deductively valid argument is. That it is truth preserving, if the premises are true then the conclusion must be true.
这是自私的想法，但是我知道你出生就非常自私-这就是为什么我以你能理解的方式解释真理。
This is a selfish thought, but I know that you are very selfish from birth - this is why I'm explaining the truth to you in terms you can understand.
这是自私的想法，但是我知道你出生就非常自私-这就是为什么我以你能理解的方式解释真理。
This is a selfish thought, but I know that you are very selfish from birth - this is why I'm explaining the truth to you in terms you can understand.
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