|Sensation: ability to detect differences between own inner states related to stimuli. Sensations are fundamentally for perceptions and unlike them not linked to linguistic abilities. See also sensory impression, impression, perception, stimulation, stimuli, emotion, experience.|
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Sensation / Dennett: there was never a proper definition of "sentience" (sensitivity) , but you summed up as the lowest form of consciousness on.
Sensitivity: needs, other than feeling, no consciousness.
E.g. protozoa, thermometer, light sensitive film, plants, fuel gauge.
The question of what distinguishes sensation over the mere sensitivity, has never been satisfactorily answered.
Darwins gefährliches Erbe Hamburg 1997
Spielarten des Geistes Gütersloh 1999