diff --git a/logicals.qmd b/logicals.qmd
index 3146e17..e778322 100644
--- a/logicals.qmd
+++ b/logicals.qmd
@@ -243,9 +243,11 @@ df |>
   )
 ```
 
-To understand what's going on, think about `NA | TRUE`.
+To understand what's going on, think about `NA | TRUE` (`NA` or `TRUE`).
 A missing value in a logical vector means that the value could either be `TRUE` or `FALSE`.
-`TRUE | TRUE` and `FALSE | TRUE` are both `TRUE`, so `NA | TRUE` must also be `TRUE`.
+`TRUE | TRUE` and `FALSE | TRUE` are both `TRUE` because at least one of them is `TRUE`.
+`NA | TRUE` must also be `TRUE` because `NA` can either be `TRUE` or `FALSE`.
+However, `NA | FALSE` is `NA` because we don't know if `NA` is `TRUE` or `FALSE`.
 Similar reasoning applies with `NA & FALSE`.
 
 ### Order of operations