The principle of reality we can discern is that there are always two different parts and a boundary or a bridge between them. Our problem is that we can’t logically distinguish a boundary from a bridge.
A boundary is logically an OR-gate, whereas a bridge is an AND-gate, and an AND-gate is actually just a kind of an an OR-gate.
The sharp boundary between a boundary and a bridge is an XOR-gate, which accepts a strict OR but not an AND.
However, the problem is that there is no logical expression for something that accepts only a strict AND, that is, excluding all OR:s. This lack may appear insignificant, but does actually mean that that there isn’t any single truth.