1. Kantian Ethics

2. Types of Theory

3. Types of Theory Teleological
The consequence of the moral act is the important thing

4. Types of Theory Teleological Deontological
The consequence of the moral act is the important thing
Deontological
Rightness is determined by some moral value in the act itself

5. The Inquisitive Murderer

6. The Inquisitive Murderer
Should you tell an intending murderer where his victim-to-be is hiding?

7. The Inquisitive Murderer
Should you tell an intending murderer where his victim-to-be is hiding?
Most people say no.

8. The Inquisitive Murderer
Should you tell an intending murderer where his victim-to-be is hiding?
Most people say no.
Kant says it’s always wrong to lie.

9. Duty

10. Duty
Fundamental ethical concept is Obligation

11. Duty Fundamental ethical concept is Obligation
Expressed in imperatives using ought

12. Imperatives

13. Imperatives
Hypothetical
If you want X then you ought to do Y

14. Imperatives Hypothetical If you want X then you ought to do Y
Categorical
You ought to do Y

15. The Categorical Imperative
Act only according to that maxim by which you can at the same time will that it should become a universal law

16. Problems

17. Problems The indeterminacy of maxims
There are many ways to describe an action we propose to take

18. Problems The indeterminacy of maxims
There are many ways to describe an action we propose to take
The plurality of duties
If duties do conflict then there can’t be a single rule

19. Problems The indeterminacy of maxims
There are many ways to describe an action we propose to take
The plurality of duties
If duties do conflict then there can’t be a single rule
The underdetermination of duties
This rule produces an excess of possible duties

20. Value

21. Value
Instead of duty consider the innate worth of persons

22. Statements of Ends

23. Statements of Ends Conditional Value
X is valued as a means to an end Y

24. Statements of Ends Conditional Value Unconditional Value
X is valued as a means to an end Y
Unconditional Value
X (a person) is valued for itself

25. The Principle of Ends
Act so that you treat humanity, whether in your own person or in that of another, always as an end and never as a means only

26. Problems

27. Problems
The value of rationality
How does rationality create value?

28. Problems The value of rationality How does rationality create value?
Why think rationality is unconditionally valuable?

29. Problems The value of rationality How does rationality create value?
Why think rationality is unconditionally valuable?
What about animals and imbeciles?