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> They pick battles they can win and don't engage with ideas that really are challenging to their reasoning methods or priors

What's an example of one?

Scott Alexander's comment on Effectivealtruism.org's purchase of a £15M estate is an example. See [0] for the quote and my comment on it.

I'm not sure what the mistake was there? I thought their whole thing was judging orgs by cost:benefit calculation, which this seems to fit.