!!! Overview
[{$pagename}] (0) implies it is neither positive or negative.

[{$pagename}] is both a [number] and the [numerical] [digit] used to represent that number in numerals. 

[{$pagename}] may be used to denote the [truth value] [false].

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]