My point was just that whatever mental heuristics we use to decide whether information is worth parsing or not are built up over our lives. As with all such app

My point was just that whatever mental heuristics we use to decide whether information is worth parsing or not are built up over our lives. As with all such approximating things, there is trade-off between false positives and false negatives. The large amount of junk information one encounters in modernity could lead to aggressively-tuned heuristics, resulting in more false positives relative to negatives, effectively sending useful information to a mental spam folder.