I think you are looking for binary opposition.
A binary opposition (also binary system) is a pair of related terms or concepts that are opposite in meaning. Binary opposition is the system by which, in language and thought, two theoretical opposites are strictly defined and set off against one another. It is the contrast between two mutually exclusive terms, such as on and off, up and down, left and right. Wikipedia
Deconstruction theory touches upon binary oppositions and explains how one of them cannot exist without the other:
Deconstruction is interested in the hierarchic binaries set up within texts. These could be: man/woman, speech/writing, white/black, inside/outside, full/empty, identity/difference, light/dark, presence/absence, similarity/difference. In each of these binaries, one term is privileged over the other. A deconstructive reading would show how, even when a text appears to privilege one term over the other (say, inside over outside), the text's logic of rhetoric reveals that there can be no inside without the outside. In other words, deconstruction shows how the less privileged term is central to the dominant term. By showing this centrality deconstruction reverses the hierarchy, for if the inside can exist only if there is an outside it means that the outside is the dominant element.
In its next stage, deconstruction destabilizes this reverse hierarchy too. It questions the new hierarchy and thus leaves even the displaced one unstable. Thus, the text remains unresolvable where neither term is privileged - a situation called 'aporia'.
Contemporary Literary And Cultural Theory: From Structuralism To Ecocriticism