more spec tweaks
Change-Id: Ib5ccab3bbfc59d11715896763bb19970997778f3
diff --git a/doc/tutorial/basics/aliases.md b/doc/tutorial/basics/aliases.md
index 481294c..ef96dcf 100644
--- a/doc/tutorial/basics/aliases.md
+++ b/doc/tutorial/basics/aliases.md
@@ -8,8 +8,8 @@
A typical use case is to provide access to a shadowed field.
-Alias are not members of a struct. They can be referred to, but they do not
-appear in the output.
+Alias are not members of a struct. They can be referred to only within the
+struct, and they do not appear in the output.
<!-- CUE editor -->
```
