[lit-ideas] Re: Snow is white, and Grass is green (Collected Papers by Tarski)

A. Ramos:


"Theorectical statements about language are about as useful as  theorectical 
statements about the natives of unknown lands. Language  isn't a logical set. 
Logical rules work for some statements, but not  for others. If a statement is 
illogical, it doesn't mean it is wrong.  Logic can be within language, but 
language is not within logic."  


R. Paul:

>I wonder if we could have an example of an illogical  statement?
 
I'll let Ramos elaborate, but I'd suggest something  like
 
 
     If snow is white, grass is  green.
     Snow is white
     --------------------------------
     Ergo, it is not the case  that grass is green.
 
Turning that into a single statement:
 
"It is a tautology that if grass is green is a necessary  condition for snow 
being white and snow is white, grass is not  green."
 
R. Paul would say that's _false_ rather than  illogical.
 
But it is _analytically_ false, which possibly means what  Andreas means by 
'illogical statement'.
 
Then there's Geary's Lexicon:

illogical, adj. 
               against logical. Of a statement,
              an  illogical statement is one
               said to contradict what my logic
              i.e.  beliefs (truth, pussy) is, are, etc.
 
Cheers,
 
JL



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