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+Explanation: Every ❰List❱ documents the type of its elements with a type
+annotation, like this:
+
+
+ ┌──────────────────────────┐
+ │ [1, 2, 3] : List Integer │ A ❰List❱ of three ❰Integer❱s
+ └──────────────────────────┘
+ ⇧
+ The type of the ❰List❱'s elements, which are ❰Integer❱s
+
+
+ ┌───────────────────┐
+ │ [] : List Integer │ An empty ❰List❱
+ └───────────────────┘
+ ⇧
+ You still specify the type even when the ❰List❱ is empty
+
+
+The element type must be a type and not something else. For example, the
+following element types are $_NOT valid:
+
+
+ ┌──────────────┐
+ │ ... : List 1 │
+ └──────────────┘
+ ⇧
+ This is an ❰Integer❱ and not a ❰Type❱
+
+
+ ┌─────────────────┐
+ │ ... : List Type │
+ └─────────────────┘
+ ⇧
+ This is a ❰Kind❱ and not a ❰Type❱
+
+
+Even if the ❰List❱ is empty you still must specify a valid type
+
+You declared that the ❰List❱'s elements should have type:
+
+↳ $txt0
+
+... which is not a ❰Type❱