Kant's Four Illustrations
1. Perfect Duty to Self
Is it morally permissible to commit suicide? (No)
2. Perfect Duty to Others
Is it morally permissible to make a lying promise? (No)
3. Imperfect Duty to Self
Is it morally permissible to neglect ones natural gifts? (No)
4. Imperfect Duty to Others
Is it morally permissible to refrain from helping others? (No)
Richard Lee,