diff --git a/core-functions.md b/core-functions.md
index 3f0faf0..731b401 100644
--- a/core-functions.md
+++ b/core-functions.md
@@ -26,7 +26,7 @@ Public. Takes one argument. If that argument is a CONS cell and is readable by t
 
 # (cond args...)
 
-Public. Takes an arbitrary number of arguments each of which are lists. The arguments are examined in turn until the first element of an argument evaluates to non-nil; then each of the remaining elements of that argument are evaluated in turn and the value of the last element returned. If no argument has a first element which evaluates to true, returns NIL.
+Public. Takes an arbitrary number of arguments each of which are lists. The arguments are examined in turn until the first element of an argument evaluates to non-nil; then each of the remaining elements of that argument are evaluated in turn and the value of the last element returned. If no argument has a first element which evaluates to true, returns NIL. _Note: this is explicit flow control and clauses will not be evaluated in parallel._
 
 # (cons a d)