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theorem proved term proof

xorBool_true

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formal statement (Lean)

 248private theorem xorBool_true (b : Bool) : xorBool true b = !b := by

proof body

Term-mode proof.

 249  cases b <;> rfl
 250
 251/-- The Boolean strict-realization interpretation is the parity map.
 252
 253This is the formal statement that the iteration count survives even when
 254the orbit-as-set collapses to `{false, true}`. -/

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