Before revision: The first task of deconstruction is, according to Derrida, to find and overturn these oppositions inside text(s); but the final objective of deconstruction is not to surpass all oppositions, because it is assumed they are structurally necessary to produce sense: the oppositions simply cannot be suspended once and for all, as the hierarchy of dual oppositions always reestablishes itself (because it is necessary to meaning).
After revision: The first task of deconstruction is, according for Derrida, to find and overturn these oppositions inside text(s); but the final objective of deconstruction is not to surpass all oppositions, because it is assumed they are structurally necessary to produce sense: the oppositions simply cannot be suspended once and for all, as the hierarchy of dual oppositions always reestablishes itself (because it is necessary to meaning).