Philosophy in Practice
Learn to apply the rigorous tools of philosophy to evaluate daily arguments, untangle complex moral dilemmas, and audit your own core beliefs. Move past passive theory and master the analytical methods that bring clarity to real-world decisions.
Like Duolingo, but for Philosophy in Practice. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
21 levels across 3 sections, about 42 minutes end to end, roughly 8 days at five minutes a day. It moves through Clarifying Everyday Disagreements, Making Tough Ethical and Epistemic Choices, and Navigating Uncertainty and Living with Conviction. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android

Key ideas in Philosophy in Practice
- Everyday arguments often function as enthymemes, leaving key connective premises unsaid
- Disputes stall when listeners attack stated facts instead of the unstated causal premise
- A logically valid deduction requires a premise linking the observed trend to the policy
- The principle of charity requires interpreting arguments in their most rational form
- Charitably supplying the strongest bridge premise prevents defeating a mere straw man
- Refuting a weak version leaves the opponent's core intuition completely intact
- Bridge premises connect observable situations to normative claims about action
- An empirical assumption hinges on measurable cause-and-effect facts in the world
- A normative assumption hinges on a hierarchy of values that data alone cannot settle
- Socratic inquiry invites an interlocutor to co-examine their unstated bridges
- Accusing someone of missing logic triggers cognitive defensiveness and retrenchment
- Questioning a bridge premise tests if both speakers share the same starting point
- A linchpin premise is one whose denial immediately collapses the main conclusion
- An assumption that can be removed without altering the deduction is rhetorical clutter
- Testing an argument requires isolating load-bearing premises from auxiliary claims
- Operational edge cases expose hidden assumptions buried inside everyday ethical concepts
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Philosophy in Practice the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
A friend says, 'Sales fell, so our ad campaign failed!' Why do arguments like this often stall in circles?
Get it right to open this lesson and 20 more in the app.
Where Philosophy in Practice takes you
- 1
Clarifying Everyday Disagreements
- Exposing Hidden Assumptions in Daily Arguments
- Stress-Testing Concepts with Counterexamples
- 2
Making Tough Ethical and Epistemic Choices
- Arbitrating Conflicting Ethical Frameworks
- Auditing What You Take on Trust
- Running Thought Experiments on Real Policies
- 3
Navigating Uncertainty and Living with Conviction
- Deciding Under Radical Uncertainty and Value Drift
- Building Coherence Through Reflective Equilibrium
3 sections · 7 units · 21 levels. Built to play, not to enroll.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
Philosophy in Practice is taught in the Bestie style: your friend who just gets it. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start Philosophy in Practice today.
Download Tomo, search Philosophy in Practice, and play your first lesson in under a minute.