Derrida states that his use of the word deconstruction first took place in a context in which "structuralism was dominant" and deconstruction's meaning is within this context. Derrida states that deconstruction is an "antistructuralist gesture" because "tructures were to be undone, decomposed, desedimented". At the same time, deconstruction is also a "structuralist gesture" because it is concerned with the structure of texts. So, deconstruction involves "a certain attention to structures" and tries to "understand how an 'ensemble' was constituted". As both a structuralist and an antistructuralist gesture, deconstruction is tied up with what Derrida calls the "structural problematic". The structural problematic for Derrida is the tension between genesis, that which is "in the essential mode of creation or movement", and structure: "systems, or complexes, or static configurations". An example of genesis would be the sensory ideas from which knowledge is then derived in the empirical epistemology. An example of structure would be a binary opposition such as good and evil where the meaning of each element is established, at least partly, through its relationship to the other element.