Philosophize This!
Philosophize This!

Episode #248 ... What philosophers say about lying.

May 31, 2026

AI Summary

5 min read

Lying is not a simple matter of knowingly saying something false. Philosophers have long argued that the act of lying is far more complex, and its moral weight depends on context, scale, and the relationship between the liar and the deceived. This episode of Philosophize This! explores what major thinkers from Augustine to Nietzsche have said about lying, challenging the common assumption that truth is always superior and that a lie is merely a false statement intended to deceive.

The corrosive power of lies

The majority of philosophers agree that lying is deeply damaging, but they focus on different scales of harm. St. Augustine argued that lying splits the liar internally. When you say one thing and think another, you create a "double heart," fracturing your own sense of self. The more you lie, the more performances you must maintain, which trains you to accept deception even toward yourself. The liar is deceived into thinking the lie does no harm to them.

Montaigne shifted the focus to social bonds. He argued that society depends on trust—the basic assumption that people mean what they say. A lie is insidious because a falsehood has "a hundred thousand faces." Once you know someone is willing to mislead you, you cannot navigate any interaction without suspicion. You cannot live your life investigating every statement.

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What you'll learn

  • 1 (00:17) **Episode Setup & Common Assumptions About Lying** - Stephen West introduces the topic and outlines the typical, common-sense view of lying that many people hold.
  • 2 (01:42) **Nietzsche's Challenge: Is Truth Always Superior?** - Nietzsche argues that the value of truth is not absolute; false beliefs can be necessary and useful.
  • 3 (04:50) **The Incomplete Definition of a Lie** - The standard definition of a lie is far too simple to capture the phenomenon's complexity, as detailed in the Stanford Encyclopedia of Philosophy.
  • 4 (07:38) **The Harm of Lying: The Individual Scale (St. Augustine)** - St. Augustine focuses on how lying splits the liar's self, creating a corrosive separation between private feeling and public act.
  • 5 (09:46) **The Harm of Lying: The Social Scale (Montaigne)** - Montaigne argues that the biggest cost of lying is the destruction of the social trust required for basic societal functioning.
  • 6 (11:33) **The Harm of Lying: The Contradiction (Kant)** - Kant and Montaigne identify a fundamental contradiction in lying: it parasitically relies on the trust built by truth-tellers.
  • 7 (13:56) **The Harm of Lying: The Political Scale (Hannah Arendt)** - Hannah Arendt examines how ubiquitous lying at a societal level erodes the very possibility of a shared reality and political choice.

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Show Notes

Today we talk about some of the best arguments for and against lying in the history of philosophy. Hope you love it. :)


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