Is It True That Tarski Sky is Blue?

From: Ian Goddard (igoddard@netkonnect.net)
Date: Sat May 23 1998 - 01:53:04 MDT


Christian Whitaker (christcream@hotmail.com)

>I suppose one could solve the vagueness of blue by assigning it a strict
>definition. Blue is light with a wavelength of 550 nm. Given such a
>definition, the truth value of the statement 'le ciel est bleu' must be
>no, as the value will be something other than precisely 550 nm, and will
>fluctuate across the horizon and from second to second as light is
>marginally refracted by water vapor and other chemicals inthe
>atmosphere.

   IAN: The point is that a given
   statement X is true to the degree
   it accurately maps reality. "Blue"
   may be said to be a broad range
   of colors that are "bluish."

   The truth is primarily physical
   things, secondarily the degree of
   accuracy that words relate to things.
   Indeed, fuzzy logic helps to define such.

********************************************************
IAN Williams Goddard ------> http://Ian.Goddard.net
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Statements T r u t h A defines -A
                a -A defines A
 A: x is A b A -A
                l T F A set is defined
-A: x is -A e F T by its members, thus
                    ? ? A & -A contain each other.
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