Twosome
Under Construction: An exposition by Andrius Kulikauskas.

The twosome is the division of everything into two perspectives. Matters of existence require two points of view: We need to be able to raise a question, does a chair exist or not? but also suppose an answer: If it exists, then it exists; if not, then not.
In documenting these frameworks, I introspect my own imagination's options. I also note how I conceive the same cognitive frameworks by different representations, which are manifestly limited in their variety. Indeed, our minds do not conceive the division directly but must employ one or another representation.
For example, I can imagine the perspective of opposites coexisting as "free will" and the perspective of all being the same as "fate". Indeed, classic, intractable debates such as "free will vs. fate" are important evidence for these frameworks. Throughout history, different philosophers describe similar frameworks in their own terms.
Another representation is in terms of outside and inside. If there is an an outside of a cup, then there is also an inside. But if I fall inside the cup - if it becomes my universe - then there is only an inside. Note also that our mind slides easily from outside to inside, or from free will to fate, but not the other way around.
A third representation is in terms of theory and practice. In theory, I am detached from what I am studying, as if it were a machine that is turned off. But in practice, the machine is turned on, I am one with my experience, like a carrot going through a mill. We complement each other and are one.
Same and different are a fourth and final representation. If two cups are the same, then they must also be different. But if they are different, then they are just different. Here it is remarkable that the concept of sameness actually involves opposites coexisting, whereas the concept of difference means that all is the same. This illustrates the pitfalls of introspection because adding a layer of reflection typically reverses the direction in which our minds move.