Overhead in class.

A good universal principle is "the golden rule", right? So do what you'd have others do unto you. or Don't do what you wouldn't have others do to you.

The year is 1942. You are a German citizen hiding Jews. You answer the knock on the door. The gestapo demands to know if you are hiding Jews. How do you answer?
"Yes. They're in the back," telling the truth?

This is where the Golden Rule doesn't really seem moral.


Kant's Categorical Imperative. Act as if the principle guiding your action were to become a universal law (i.e. tell the truth to the Gestapo because everyone should tell the truth).