This depends on whether you model contrarianism and futurism as a bias ('Hanson is especially untrustworthy about futurist topics, since he works in the area') v. modeling contrarianism and futurism as skills one can train or bodies of knowledge one can learn ('Hanson is especially trustworthy about futurist topics, since he works in the area').
My typical heuristic for reliable experts (taken from Thinking Fast and Slow I think) is that if experts have tight, reliable feedback loops, they tend to be more trustworthy. Futurism obviously fails this test. Contrarianism isn't really a "field" in itself, and I tend to think of it more as a bias... although EY would obviously disagree.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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