Why this class does not return false|| true?

Why this class does not return false|| true?

References

Reference NO 1

http://stackoverflow.com/questions/15203920/why-this-class-does-not-return-false-true

Reference NO 2

http://stackoverflow.com/questions/14887055/jquery-find-a-class-exist-and-return-true-false

Reference NO 3

http://www.javaranch.com/journal/2002/10/equalhash.html

Reference NO 4

http://php.net/manual/en/function.get-parent-class.php

Reference NO 5

http://css-tricks.com/return-false-and-prevent-default/

Reference NO 6

http://pmd.sourceforge.net/pmd-4.3/rules/design.html

Reference NO 7

http://docs.python.org/library/abc.html

Reference NO 8

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