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Re: Impressed but confused, gluing a list together...

From: Sean Charles
Subject: Re: Impressed but confused, gluing a list together...
Date: Tue, 1 Oct 2013 22:50:16 +0100 
> 
> I added a cut to avoid the solution with trailing glue.
> join([X], _, [X]) :- !.

I am confused at the cut.. I have not yet experienced trailing glue, that was 
the point of the second rule!?
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