[Dataman]

A postmodern mind can hold conflicting beliefs.

Bertrand Russell (no Pomost Modernist) said this was the sign of a great mind.

The adult mind in which A can be both A and non-A at the same time is not sane. We cannot be sure which side of the line Russell was on at any given time.

[Borges]

The essence of PoMo or deconstruction is that all assumptions and indeed all of reality is based on constructs of binary oppositions. Yes/No, Good/Bad...and that if you undermine these oppositions everything else gets undermined with them. It's a rhetorical tool that can be used any which way.