diff --git a/presentation/presentation.md b/presentation/presentation.md
index ccf415f..40ee381 100644
--- a/presentation/presentation.md
+++ b/presentation/presentation.md
@@ -134,7 +134,7 @@ end
 
 ## Safety
  - If a game state exists, then it was created by a user
- - The game state can not divert.
+ - The game state cannot divert.
 
 ## Liveness
  - Eventually all users will have the same game state