tag:blogger.com,1999:blog-3317748811909502538.post4886438422208532968..comments2019-06-29T14:01:15.876+01:00Comments on Intropy: Randomness is nothing. Nothingness is random.DaveoftheNewCityhttp://www.blogger.com/profile/04140446220455064332noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-3317748811909502538.post-84271068119630539382017-07-18T14:29:59.994+01:002017-07-18T14:29:59.994+01:00Thanks for the comment - it raises an interesting ...Thanks for the comment - it raises an interesting point. <br /><br />The fact that something is random can carry information, provided it can be compared, set alongside, something that is not random. The information is in the difference between being random and not being random: the 'difference that makes the difference'. That difference can carry information, provided it is not itself random. So, differences are needed to carry information, but differences will not carry information if they are random. <br /><br />So, let's try to (semi-) formalise it. There is a variable, n, and System A (person, whatever) which repeatedly measures it. The value of n is not related to anything System A knows about: it is completely random with respect to anything in System A's narratives. System A therefore learns nothing from each measurement: measurements of n carry no information.<br /><br />I think, Jo, what you are saying is that the fact that n is random tells you something: carries the information that n is random, if you like? That is true, but only if there exists (or there is the possibility that it could exist) some other variable, m, which is not random. The information is in the difference between variables n and m. That is not a random difference: it comes about because n is unrelated to anything System A knows about but m is correlated with something System A knows about. <br /><br />Hope that makes some sort of sense!<br /><br />David Chapmanhttps://www.blogger.com/profile/01959069828311977846noreply@blogger.comtag:blogger.com,1999:blog-3317748811909502538.post-37999638441706734912017-07-17T13:12:02.701+01:002017-07-17T13:12:02.701+01:00As a psychologist, I like the perspective of "...As a psychologist, I like the perspective of "what is important is information" because I am interested in people's actions and that interest is based on a belief that they are too.<br /><br />I was also surprised when you encouraged an intuition that randomness does not carry information.<br /><br />One of the milestones in grasping the professional knowledge of psychology is understanding that something that is modelled as random has a mean value tending to zero and is unrelated to some other variable. That does mean it is unrelated to everything. (And there certainly is data otherwise we could't check and we wouldn't have cared in the first place!)<br /><br />So I was glad you ended where you did.<br /><br />Having said all of this my physics is fairly rubbish and I am not sure how well I grasped the physics' bits.Johttp://www.open.ac.uk/people/jj5892noreply@blogger.com