Logos01 comments on Bayes Slays Goodman's Grue - Less Wrong

0 Post author: potato 17 November 2011 10:45AM

You are viewing a comment permalink. View the original post to see all comments and the full post content.

Comments (120)

You are viewing a single comment's thread. Show more comments above.

Comment author: Logos01 17 November 2011 11:54:24AM *  -1 points [-]

I guessed what seemed bayesian to me about the whole thing was the analogy to bayse's table problem, which was the main intuition pump I used to solve the problem. I'll edit the article to reflect this. Thanks

The first thing that struck me was the inherently self-contradictory nature of the grue definition. For physical properties to be retroactively alterable seems to contradict fundamental principles of causality and matter.

Am I simply not understanding the topic? Or is my intuitive-conceptualization too influenced by "timeless physics"? (The notion that all moments in time can be stated to 'exist').

The most you get with statements about "grue-ness" is that some objects which we observed to be "green" were in fact green but after a specific time (T) all changed to another color. This does not change the fact that they were green in the past.

Science seems perfectly-well suited to handling things that change from one state to another. Radioactive decay, for example. If this is some extra-material transition that occurs... well, I just don't see how that's an actually available physical phenomenon. If you change the definition of the term, you are now discussing a new thing.

Comment author: potato 17 November 2011 12:02:58PM 1 point [-]

you are missing the point. nothing changes color. and no definitions are changed, only meanings.

Comment author: Logos01 17 November 2011 12:06:48PM *  1 point [-]

and no definitions are changed, only meanings.

... but meanings are definitions. You can't change one without changing the other. The terms are synonyms.

Time-based definitions just mean you use one definition before time T and another definition after time T. I am lost as to what the paradox here is.

Comment author: potato 17 November 2011 12:29:42PM 1 point [-]

defenitions point to meanings, but the meaning of a term can only be found by looking at the cognitive machines that use the term, and in that specific contxt as well.

Comment author: Logos01 17 November 2011 01:21:32PM -1 points [-]

defenitions point to meanings, but the meaning of a term can only be found by looking at the cognitive machines that use the term, and in that specific contxt as well.

...

definition:

  1. A statement of the exact meaning of a word, esp. in a dictionary.
  2. An exact statement or description of the nature, scope, or meaning of something.

meaning:

  1. What is meant by a word, text, concept, or action

Definitions are meanings. And meanings are definitions.

A ⊃ B & B ⊃ A ⊨ A = B

I remain lost as to where the paradox is supposed to be.

Comment author: Larks 17 November 2011 06:17:23PM 1 point [-]

The quotes you give suggest definitions are statements of meaning, not meanings.

Comment author: Logos01 17 November 2011 07:05:46PM -1 points [-]

... I am not especially aware of there being a functional difference between a "statement of meaning" and the meaning itself when we're discussing what terms mean.

Anything that is applicable to a definition is applicable to the meaning itself. Any adjustment of the meaning adjusts the defintion. Any adjustment of the definition adjusts the meaning. When you have a direct correlation with bi-directional causality, that is mutual identity.

Comment author: potato 18 November 2011 06:47:23PM 1 point [-]

Have you read the cluster structure of thing space? Or the exponential concept space article? I recommend them.

Comment author: Logos01 18 November 2011 11:27:41PM *  0 points [-]

Yes I have read them, and they are not relevant to the topic of mutual identity between 'definition' and 'meaning*'.

*: s/magic/meaning/. Thanks, Swype!

Comment author: TheOtherDave 17 November 2011 01:10:33PM 0 points [-]

Would you similarly say that "mortal" is a term with a self-contradictory definition?