I think that your intuition is correct... human thought has a binary nature and even to think one thing you must be able to think the exact opposite thought. You can not have a idea of the "death" if you do not know what is the idea of "life". Reversing the idea of mortality we got the abstract idea of "immortality". Reversing the imaginary of some patriarchal societies where men rule and can have multiple wives it's possible to imagine a fantasy matriarchal society controlled by women who practice polyandry. Etc.