I don't know what the author of this passages is rambling on about, but I think he says that the sentence can be taken either as a question or an assertion, not both at the same time. Presumably it is the repetition of a question asked before in the context. Since it is a repeated question, the speaker has likely changed it a bit, and here he has changed it to what is becoming a more common S-V order for questions in modern English: You're coming?
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Mister MicawberI don't know what the author of this passages is rambling on aboutI do. It's Wittgenstein rambling on about "certainty". The essay is "On Certainty", and I don't think any of it can be correctly explained by anyone but a Wittgenstein expert. Only the most advanced philosophy students seem to able to explain this stuff.
wholegrainNeither the question nor the assertion makes sense.This means:
CalifJimwholegrainNeither the question nor the assertion makes sense.This means:
Whether you frame the thought as a question ("Do I know that a sick man is lying here?") or as an assertion ("I know that a sick man is lying here."), it makes no sense.
I think the point the author is making is that the sick man