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This is what I said:
If "non-mining nodes [are] irrelevant to Bitcoin security," that implies either that "Bitcoin is secure with only mining nodes" or "Bitcoin is insecure no matter what."
My statement above specifically addresses the former. It is absolutely not secure with only mining nodes. The burden is on you to prove the second statement.
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There is no such thing as proof in game theory and economics. In any case, for this to be relevant, you need to make the case that this is sufficient to profitably attack the system. Otherwise it's just a meaningless metric.

Lol, that's where the root of your problem lies -- you think that "there's no such thing as proof in game theory and economics," so it's OK to ask me for proof when logic fails you.
No, friend, game theory is "the study of mathematical models of conflict and cooperation between intelligent rational decision-makers." Mathematical models are the very essence of being open to proof,
see here. Sorry 'bout previously bringing Godel into this, assumed our differences were more nuanced. Turns out they're rather basic -- you simply have no clue about the shit you talk about.