113theorem photonEM_before_embodiedObserver : 114 Before Stage.photonEM Stage.embodiedObserver := by
proof body
Decided by rfl or decide.
115 decide 116 117/-! ## Light: two senses -/ 118 119/-- Recognition-light: the revealing act of an interface making distinction 120available. This is pre-temporal. -/
depends on (12)
Lean names referenced from this declaration's body.