animal wrote:The only way that irreducible complexity makes its argument when it 'infers' a 'goal-directed/intended' system is by working backwards - looking at complex systems and then removing parts in order to show that the system in question could not work without them- like a child breaking apart a device - a remote control, cell phone, what have you, to see how the device works in the absence of a specific part.
I may be wrong, but my understanding is this:
When we take apart a device (going backwards) we see all the necessary components for it to function. We also see (some of the time, as is the case with IC) that the device will not work with the absence of some of the pieces. Not that it will still work, only a little less. It will not work. A complex cell phone without a battery is as useless as a simple rock of the same size.
The point is that, unless someone or something is putting the device together all the pieces at the same time, it is unlikely the device will come together. It is incapable of being assembled in step-by-step improvements. (again, what good is a cell phone that is missing a battery, or a speaker, or a microphone?)
That is the point of the goal oriented part. Evolution cannot say "hey, this speaker will come in handy later when i get a battery to power it, maybe i should keep it for now" If the speaker isn't immediately useful (which it isn't in a cell phone without a battery to power it) then evolution is going to throw the speaker away.
animal wrote:This process is fine (its also called ablation) as long as you remember that things do not evolve 'backwards'. This is important to note as when you begin to work backwards in this way, you begin to observe the present function of a part as the 'goal' of the evolutionary process. It's an illusion which Michael Behe creates (and admits) - that by working backwards, the illusion is created that the function of the system is the 'goal' of the system.
The point is that the system cannot be put together gradually and that it has no function at all when missing one or many pieces. What difference is a cell phone that has no battery to a cell phone that has no battery and no speaker? Nothing. Both are simple paperweights. Adding a speaker to a phone without a battery doesn't change the function, it only makes it harder to assemble (and evolution would favor the easier assembly). The only reason the goal-oriented discussion is included is because many evolutionist will work this way as well. "The cell phone case is a good paperweight, and then such-n-such is added (a cell phone specific part like a speaker), then such-n-such improvement is made"
But no improvement is made. When a cell phone case 'evolves' a speaker, no benefit comes. So, the speaker is thrown away and the case remains unchanged. How can an entire cell phone assemble in a step by step process when each step does nothing to improve the over quality of the phone?
Now, some people may say that a bigger diaphram on the speaker will improve the speaker sound or a bigger battery will create longer life, etc., etc. But, how did it all come into place originally? Once it is all together, some small, step-by-step improvements can be made to increase the performence of the cell phone, but that is only after the entire device is put together.
animal wrote:I don't think they are used within the same context at all. ID asserts purpose when they use 'design'. ID has yet to prove any purposes exists within any of the mechanisms, functions or organisms it questions.
Maybe i am misunderstanding you, how does ID assert purpose? It merely infers a
designer from the
design, where evolution asserts
random from the
design. ID removes the random, it doesn't add purpose.