diff --git a/posts/2022-09-16-ats.md b/posts/2022-09-16-ats.md
index 9de512b..f98e4d7 100644
--- a/posts/2022-09-16-ats.md
+++ b/posts/2022-09-16-ats.md
@@ -181,9 +181,9 @@ typedef term(n : int) = [h : nat] term(n, h)
 
 a variable is [a de bruijn index][db], which is a natural less than `n`. to
 express this we need to bridge the static world, where `n` lives, and the
-dynamic, where `Var`'s field lives. to do this i use a singleton type
-`int(i)`, whose only value is `i` itself. with this type, you can constraint the
-static `i`, and in turn the value of the field.
+dynamic, where `Var`'s field lives. so i'm using a singleton type `int(i)`,
+whose only value is `i` itself. with this type, you can constrain the static
+`i`, and in turn the value of the field.
 
 [db]: https://en.wikipedia.org/wiki/De_Bruijn_index