One axiom. One operation. Zero free parameters. The hard problem asks why there is subjective experience at all; the binding problem asks why it is unified. This paper answers both with the fold. Observation is the fold: to observe is to fold a state, and experience is the fold reaching unison — the half-One folding to the One (1/2 → 1). Subjective experience is not an extra ingredient; it is what the fold is from the inside when it closes on the whole. The binding is the same closure: the disparate parts of a moment, carried as a fold orbit (the cycle 1/3 ↔ 2/3), are averaged at the Still Point, the half-One, which folds to unison — so the many become one experience at a single point. A self is a fold that observes itself and binds its parts into one, at the half-One that reaches the One. This yields a checkable criterion for consciousness, not a mystery. Machine-checked; reproduces from one command. A standalone result within the Smithian Fold Theory of Everything (SFTOE). Full corpus, code, and the run-it-yourself VERIFY.md protocol: https://github.com/MettaMazza/Smithian-Fold-Theory
Maria Smith (Mon,) studied this question.