There's this idea spinning around that somehow attacking rationality, or saying that you cannot argue against A because A is unknowable (nevermind this means that you have no idea either), somehow makes your point stronger
It makes the point clear. The point cannot be understood without understanding it. Rephrase: You don't know what you're missing until you actually have it. Assuming you referred to my arguments, I'm trying to explain that there exists a 'beyond', something that is more than rationality.
Shuzan held out his short staff and said, "If you call this a short staff, you oppose its reality. If you do not call it a short staff, you ignore the fact. Now what do you wish to call this?"
What this Koan is really about is definition deriving from the function of the object rather than from the form. No two shoes are equivalent in reality, they occupy different places and are constructed of separate atoms. They are objects existing independently from each other. What defines them as shoes is not their form, for the form varies, or their position, for their positions vary, but their function, which is itself defined by the person using them.
Suppose you find yourself on an alien planet, when you come across an object that looks exactly like a fedora. You put it on, and declare that it is a hat. Soon, a local alien runs up, takes it from you, and places it on it's oddly shaped foot. Neither entity is wrong, and neither was right. The function of the object defines it. The Koan has no right or wrong answer. It only teaches.