T19364.hs:9:12: error: [GHC-83865]
    • Couldn't match type ‘[Char]’ with ‘Bool’
      Expected: Foo
        Actual: String
    • In the first argument of ‘Pair’, namely ‘"yes"’
      In the expression: Pair "yes" "no"
      In an equation for ‘baz’: baz = Pair "yes" "no"