Yet, people can and will use heuristics as GP does to make such inferences all the time. I don’t think we can help it. Whether that’s a problem depends on what

Yet, people can and will use heuristics as GP does to make such inferences all the time. I don’t think we can help it. Whether that’s a problem depends on what one does with such an inference. In the case of a suspected cold, it’s perfectly reasonable to keep one’s distance to try to avoid catching it, whether the supposition is correct or not. Suspected depression? Harder to say, but at minimum I hope that appraisal engenders understanding and compassion. I think gently suggesting someone seek professional help is reasonable. I also think we have a tendency to overly pathologize perfectly normal mental states, however, and especially if (as the OP states) a person appraises themselves to be OK, then suggestion should not become insistence.