I cant say much about the semantics of until in the context that you have described it as neither English nor Italian are my native languages.

However I believe that the use of until and unless and the likes are dangerous for precisely this reason. I find it far better to use while( ! ) and if(!) for complex conditions.

Regarding the negation - You need to use De Morgan's laws for that negation. It essentially states: 

NOT( A OR B ) <==> NOT(A) AND NOT(B)
NOT( A AND B ) <==> NOT(A) OR NOT(B)

[download]

So 
NOT( ($odometer[$wheel] < 9 || $wheel < 0) ) 
==>
NOT($odometer[$wheel] < 9 ) AND NOT ($wheel < 0) 
==> 
$odometer[$wheel] >= 9 AND $wheel >= 0

[download]

In reply to Re: Untillian Headache or about the semantic of until by tmharish
in thread Untillian Headache or about the semantic of until by Discipulus

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