The saying goes: all models are wrong, some models are useful. I don’t think existing psychiatric diagnosis is particularly accurate, but I think it’s the most useful thing we have right now. And I don’t think talking about how each condition is probably made up of many root causes is a particularly damaging objection to it. We should keep the likely heterogeneity in mind and pull it out when we need it, but we shouldn’t use that as an excuse to abandon the whole nosology.

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