He makes a perfectly plausible argument to the effect that the question is grammatical rather than rhetorical.

他提出了一个貌似非常可信的论据,大意是说这个问句是语法型的，而不是修辞型的。

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So the Platonic metaphysics says quite generally, if we're thinking about the ideas or the forms, the point to grasp is they're eternal; they're non-physical.

柏拉图的形而上学论说得非常笼统,假如我们提到理念或者型相,要点就是他们是永恒的,是非现实的

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