Reality is 4-dimensional: the three spatial dimensions and the time dimension.
These four dimensions can’t be consistently reduced to a 3- or 2-dimensional description. A reduction to 3 dimensions is ambiguous (orthogonal), and a reduction to 2 dimensions (ie, a flattening out of the 3-dimensional description) is paradoxically contradictory (see Russell’s paradox).
A 4-dimensional description of reality is reality itself, whereas a consistent understanding of it is quantum mechanics.
A 4-dimensional description of reality (ie, a “true” description) is thus reality itself. The description is a finger pointing at reality.