Fundamental Philosophical Truth

"A contradiction cannot exist in reality. Not in part, nor in whole." - Chainfire by Terry Goodkind

This is the most fundamental rule of all logic. Whatever is true, is true. This cannot be disputed, or we have no basis for human reasoning whatsoever.

Do not attempt to bring postmodernism into a discussion, because by making the basic truth statement of the worldview (that nothing is essentially true), you inherently disprove that argument.