A friend hides in your closet and a murderer knocks asking where they are. Nearly everyone says lie, but when Benjamin Constant posed this scenario, Immanuel Kant answered that you cannot, under any circumstance. This episode unpacks the moral framework behind that conclusion: Kant’s rejection of utilitarian outcome math, the difference between hypothetical and categorical imperatives, pure practical reason, and the universalizability test that separates perfect duties like not stealing from imperfect duties like developing your talents.

The hosts explain why Kant explicitly rejected the Golden Rule using the example of a judge and a prisoner, what it means to treat humanity never merely as a means, how the barista at your local cafe passes the test, and his ideas of autonomy, transcendental freedom, and the kingdom of ends. They also cover his unusual route to animal welfare, critiques from Kierkegaard and Schopenhauer, the deontological defense against organ-harvesting utilitarianism, Pope Francis applying the first formulation to consumerism in 2015, and Douglas Hofstadter’s superrationality in game theory.

• Why lying to the murderer counts as a contradiction in conception
• The GPS analogy for heteronomy versus writing your own moral navigation code
• How borrowing money with no intent to repay destroys the concept of a loan
• Kierkegaard’s warning about the self-complacent illusion of being your own lawgiver
• Whether hustle culture means treating yourself merely as a means to an end