(noun) a philosophical or critical method which asserts that meanings, metaphysical constructs, and hierarchical oppositions (as between key terms in a philosophical or literary work) are always rendered unstable by their dependence on ultimately arbitrary signifiers
Deconstruction, on the contrary, starts out by rigorously suspending this assumed correspondence between mind, meaning and the concept of method which claims to unite them.
Again, there is a gap opened up between the claim to truth and the way in which the text deconstructs that claim as a merely rhetorical or post hoc rationalization