Unreliable Instinct

An impossibility? If instinct is habitual, how can it be unreliable? I suppose the answer is that the prompts are unpredictable. Anyway…….

The instinct-driven seem to share a lack of some otherwise commonly held characteristics: honesty, discretion, privacy, confidence, reliability. Perhaps these are all related to cognition and their absence suggests a cognitive deficit.
i realize this is a rather materialistic suggestion, but the widespread prevalence of this bundle of disabilities suggests an organic malfunction. You know, sort of like color blindness.