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I think it's fine — and indeed, wise — to say "I'm not familiar with the work, but I understand that there's an academic consensus here, and if I had to I'd bet money on that every time." But it's not wise to be smug about it, or assume the matter is settled once and for all.
As we accumulate familiarity with & data on the phenomena around us, we tend to develop theories with increasing explanatory power & models with increasing predictive power. But a degree of humility is always prescribed, especially for those consuming the output third-hand.
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