Good call Cimora,
From WordNet, Princeton Uni:
consciousness
n 1: an alert cognitive state in which you are aware of yourself and your situation; "he lost consciousness" [ant: unconsciousness] 2: having knowledge of; "he had no awareness of his mistakes"; "his sudden consciousness of the problem he faced"; "their intelligence and general knowingness was impressive" [syn: awareness, cognizance, knowingness]
Now, nobody can tell if any other being is truly conscious as described by the 1st defn. above so we look for evidence and draw reasonable conclusions from what scientific knowledge we have. Solipsists would rather spout Descartes all day than do this so deny the existance of all other consciousness.
We know that we are actively conscious when making decisions. We have a number of courses to decide from and spend time receiving information, validating it, and acting out a response. We also know other 'higher' mammals do this thanks to the tens of thousands of hours spent by behaviourists simply watching and recording responses to various stimuli. When an animal behaves predictably
all of the time in response to a controlled stimuli, it is thought to have no conscious reaction to that particular stimuli. If the animal shows no conscious reactions to any stimuli, it is thought to be a non-conscious animal.
I read about an interesting experiment with fish a while ago that showed how the females of this one species of fish will ignore all fish-shaped objects swimming past its nest but a fish-shaped object with a certain coloured mark that corresponded to the male of the species made the fish attack. The males of the species were known to eat the young. Then the experimenters used other shapes - squares, circles, octopus, snake etc. - all with the mark and the fish attacked everytime. This was then considered a non-conscious action, an instinct.
But if you look at the process of decision-making, you'll see that all it is is a more complex reaction than the simple 'fish attacks the coloured spot' response. There is more information present thanks to our arsenal of sense organs and our memory & representative language system, so the process takes longer. Some schools of thought conclude from this that consciousness is then just a delayed reaction and if studied,
and controlled properly, conscious animals would behave predictably too. But, memory is pretty much impossible to control so thats as far as it goes really.
After deconstructing the whole idea (I'll spare the details), I've come to the conclusion that the above theory is hinged on the absence of a 'soul' - an original, individual entity that resides within each of our bodies that is
not influenced at all by the environment we live in but rather influences the environment in a one-way fashion. The existance of this 'soul' to me is a pipedream, a fabricated logical fortress designed to withstand debunking due to its untestable nature, but in the process, not ensuring its own validity. A paradox.
So then we have two options:
1. No soul, no free will, no 'special' consciousness. We just react predictably to everything and call it consciousness.
2. Soul exists and is the source of consciousness making it special in that it is original and has will.
If 2 is the case, and the soul is unidentifiable, then we can only guess as to what has one and what does not. Guesses made based on criteria such as having a CNS, simply being a lifeform, behaving like a human, communicating the idea through language, etc. all compound uncertainty upon uncertainty.
So while the question of whether we have a soul or not is a 50/50 proposition, the question of whether or not any particular organism has a soul-derived, and therefore 'special', consciousness is less likely than that organism having no soul and therefore no 'special' consciousness. It is this inequality I base my view on. The only way to have the options equal is to say the whole universe has a soul which then devalues the distinction and is the basis for Panentheism.