The Philosopher's Toolkit
Like Duolingo, but for The Philosopher's Toolkit. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
21 levels across 3 sections, about 42 minutes end to end, roughly 8 days at five minutes a day. It moves through Sharpening Your Arguments, Navigating Moral Gray Zones, and Questioning Reality and Knowledge. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android

Key ideas in The Philosopher's Toolkit
- Validity only requires that the conclusion follows from the premises
- The Principle of Charity requires interpreting views in their most rational form
- Soundness requires both a valid structure and premises that are factually true
- Defeating a 'straw man' version of an idea fails to defeat the idea itself
- An argument can be perfectly logical while being factually absurd
- Strengthening an opponent's case ensures your critique addresses the core issue
- Distinguishing between a logically structured argument and one that is actually true
- Applying the Principle of Charity to engage with the strongest version of an opponent's case
- Enthymemes are arguments that rely on unstated or 'hidden' premises
- Hidden premises bridge the logical gap between a stated reason and a conclusion
- Exposing assumptions allows a philosopher to test the argument's foundation
- Deductive arguments aim for 'necessity' where the conclusion is guaranteed
- Inductive strength deals with 'probability' and can be weakened by new data
- Philosophical 'proof' varies based on whether the logic is formal or empirical
- Enthymemes and hidden premises
- Deductive vs Inductive logic
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 The Philosopher's Toolkit 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.
When applying the Principle of Charity, how should you treat an opponent's ambiguous statement?
Get it right to open this lesson and 20 more in the app.
Where The Philosopher's Toolkit takes you
Move beyond basic definitions to master the mechanics of logic, the nuances of ethical decision-making, and the structures of human knowledge.
- 1
Sharpening Your Arguments
- Building Bulletproof Arguments
- Spotting the Subtle Fallacies
- 2
Navigating Moral Gray Zones
- Resolving Moral Dilemmas
- Living the Good Life
- 3
Questioning Reality and Knowledge
- The Architecture of Knowledge
- The Nature of Reality
- The Just Society
3 sections · 7 units · 21 levels. Built to play, not to enroll.
You pick the voice
The Philosopher's Toolkit is taught in the 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 The Philosopher's Toolkit today.
Download Tomo, search The Philosopher's Toolkit, and play your first lesson in under a minute.