On Thu, Jan 19, 2012 at 5:28 PM, Craig Weinberg <whatsons...@gmail.com>wrote:

> I thought that the whole point of information theory is to move beyond
> quality into pure quantification.


 Yes.


> > the suggestion that information can be defined as not having anything to
> do with the difference between order and the absence of order is laughably
> preposterous


Yes.

> The idea that a bucket of water has more 'information' than DNA is
> meaningless.
>

What word didn't you understand?

>>  No, if its repeating then it would have less information, that is to
>> say it would take less information to describe the result.
>>
>
>
> > Of course, but how does that jibe with the notion that information
> ismolecular entropy? How does A-T A-T A-T or G-T G-T G-T guarantee less
> internal degrees of freedom within a DNA molecule then A-T G-C A-T?
>

It would take little information to describe a repeating sequence like
A-T-A-T-A-T.... and few ways to change it's micro-state without altering
its macro orderly appearance, so it has a very low entropy,  but it would
take a lot of information to describe a random sequence A-T G-C A-T... and
lots of ways to alter it's micro-state with it still looking random, so it
has a high entropy.

> I see no reason to use the word information at all for this. It sounds
> like you are just talking about entropy to me.
>

As I said, think about entropy as a measure of the number of ways you can
change the micro-structure of something without changing its large scale
macro appearance.


> > If I have red legos and white legos, and I build two opposite monochrome
> houses and one of mixed blocks, how in the world does that effect the
> entropy of the plastic bricks in any way?
>

It does not effect the entropy of the plastic bricks but it does change the
entropy of the structures built with those plastic bricks. For a single
part in isolation entropy is not defined, a single water molecule has no
entropy but a trillion trillion of them in a drop of water does.

  John K Clark

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