What a Self Is: The Hard Problem and the Binding Problem, Resolved as the Fold Reaching Unison

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