diff --git a/src/primaite/game/science.py b/src/primaite/game/science.py
index f6215127..19a86237 100644
--- a/src/primaite/game/science.py
+++ b/src/primaite/game/science.py
@@ -1,7 +1,7 @@
 from random import random
 
 
-def simulate_trial(p_of_success: float):
+def simulate_trial(p_of_success: float) -> bool:
     """
     Simulates the outcome of a single trial in a Bernoulli process.
 
diff --git a/src/primaite/simulator/system/applications/application.py b/src/primaite/simulator/system/applications/application.py
index 7f79ac2b..9a58c98a 100644
--- a/src/primaite/simulator/system/applications/application.py
+++ b/src/primaite/simulator/system/applications/application.py
@@ -66,7 +66,7 @@ class Application(IOSoftware):
             self.operating_state = ApplicationOperatingState.RUNNING
 
     def _application_loop(self):
-        """THe main application loop."""
+        """The main application loop."""
         pass
 
     def close(self) -> None: