Type error: error: wrong type of function argument
  --> <current file>:6:15
   |
 1 |     let bottom : Type = ∀(any : Type) → any
 2 | 
 3 | in  let not : Type → Type = λ(p : Type) → p → bottom
 4 | 
...
 9 | in  let tau
10 |         : pow (pow U) → U
   |                ^^^ this expects an argument of type: Kind
   |                    ^ but this has type: Sort
   |
   = note: expected type `Kind`
              found type `Sort`