Quote:
Originally Posted by Paul C. Anagnostopoulos I think I'm using it in the sense of weak emergence. Strong emergence is some philosophical gobbledegook having to do with irreducibility that I don't understand. If you can explain it to me, I'd appreciate it.
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Strong emergence is simply the opposite of reductionism. The basic idea of reductionism is very simple. It is the belief that all aspects of complex phenomena can be understood by reducing them to their constituent parts. It is the motions of these parts and how they interact together which explain the phenomenon concerned. For example, consider a clockwork clock. By looking at the components of that clock - namely the cogs, the springs, and the wheels - and how they all interrelate together, we can actually understand how the minute and hour clock hands move.
But imagine that when the minute and hour hands move that consciousness is produced. This would be a genuine new phenomenon which could not be derived from the internal components of the clock.
It's exactly the same for the brain. If the brain produces consciousness it is not reducible to the ultimate particles the brain is composed of. Invariably someone's going to ask how do I know since the brain is so incredibly complex. The arrangements and properties of the ultimate constituents of the brain are so incredibly complex that perhaps the brain as a whole might produce very surprising effects. Well yes, possibly the physical activity in our brains might be able to ultimate explain the totality of our behaviour.
But it can't explain the miraculous. Whatever properties the ultimate constituent particles of an object might have, they must be quantifiable and entail quantifiable effects i.e measurable. This is not to say they could not produce consciousness, a
qualitative effect, but if they did, then that would be a new phenomenon coming into existence at a certain degree of complexity not derivable from these ultimate constituent particles. Quantifiable effects
can only entail quantifiable phenomena.
Presumably this is why reductive materialists declare that consciousness is identical to either the actual biological material of the brain (identity theory) or is identical to what the brain
does i.e the causal chains of events performed by brains (functionalism). They have to say that consciousness is identical to something which is measurable because if they acknowledge the existence of consciousness in its own right, then necessarily it is not reducible and therefore reductive materialism is false.