dhw: It's amazing how fast these intelligent cells work! To reverse your own approach, it may look automatic from the outside, but who can tell the difference?-The problem for you is how to interpret cells' reaction when they are studied down to a level of the molecular reactions inside the cells that generate the responses to stimuli. All that can be seen is a series of molecules' reactions with each other to produce the response, with the same response each time the same stimulus is applied. There will be a specific molecular response to each specific stimulus. Automaticity.