fact: Definition non_trivial := λ"f" Qq 1 @ (Qq 0 @ (Qq (1/3) @ λ"1/3" "f" @ "1/3" @ "1/3" @ "1/3")) @ Id @ Id.
imports: ClassicalRealizability.Kbase ClassicalRealizability.Rationals ClassicalRealizability.Real_definitions ClassicalRealizability.Real_relations ClassicalRealizability.Real_operations