diff --git a/elixir/pacman-rules/lib/rules.ex b/elixir/pacman-rules/lib/rules.ex
index abc7171..d020f78 100644
--- a/elixir/pacman-rules/lib/rules.ex
+++ b/elixir/pacman-rules/lib/rules.ex
@@ -1,17 +1,17 @@
 defmodule Rules do
   def eat_ghost?(power_pellet_active, touching_ghost) do
-    power_pellet_active && touching_ghost
+    power_pellet_active and touching_ghost
   end
 
   def score?(touching_power_pellet, touching_dot) do
-    touching_power_pellet || touching_dot
+    touching_power_pellet or touching_dot
   end
 
   def lose?(power_pellet_active, touching_ghost) do
-    ! power_pellet_active && touching_ghost
+    not power_pellet_active and touching_ghost
   end
 
   def win?(has_eaten_all_dots, power_pellet_active, touching_ghost) do
-    has_eaten_all_dots && ! lose?(power_pellet_active, touching_ghost)
+    has_eaten_all_dots and not lose?(power_pellet_active, touching_ghost)
   end
 end