∃x : ℤ. x > 3 : Prop
∃x : ℚ. x > 3 : Prop
∃x : ℕ, y : ℕ. x > y : Prop
∃x : ℕ. ∃y : ℕ. x > y : Prop
∀x : ℕ, y : ℕ, z : ℕ. x + y + z == x + (y + z) : Prop
∃x : ℕ. ∀y : ℕ. x <= y : Prop
Error: typechecking failed.
https://disco-lang.readthedocs.io/en/latest/reference/typecheck-fail.html
Error: typechecking failed.
https://disco-lang.readthedocs.io/en/latest/reference/typecheck-fail.html
Error: typechecking failed.
https://disco-lang.readthedocs.io/en/latest/reference/typecheck-fail.html