Academics
ClaimCraft
Visual argument mapping game where players build claim-evidence-reasoning chains and compete in debate duels. Logical fallacies are attack moves to identify and counter. AI generates counterarguments and evaluates argument quality.
▶ Play it nowBuilt for sittings of about 20 minutes on the screen. That is our design budget, not a measurement.
Meet your mentor
Every Spark & Anvil app has a friendly mentor character that demonstrates, asks, and patiently scaffolds learning. On-device AI personalizes the mentor's responses to your kid's progress — never connecting to a server, never collecting data.
Mentored by Logos
#4A6FA5 ClaimCraft teaches you how to build strong arguments and think clearly! You are an apprentice advocate in the Arena of Reason, where you stack claims, evidence, and warrants like building blocks to create powerful arguments. Then test them in debate duels against AI opponents. Spot logical fallacies to weaken your opponent's arguments!
Characters who teach
Meet the cast
Each character in ClaimCraft is one move in building an argument: making a claim, weighing evidence, explaining the because, taking the other side seriously, and spotting weak reasoning (starting with your own), plus defining words, hidden assumptions, careful wording, who must prove what, and finding common ground. Logos, the mentor, frames each one.
Posit
Claim — asserting-for-testing posture (claim is a card on the table, not a fortress)
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Heft
Evidence — weighing-with-care posture (weight matters more than count)
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Lean
Warrant — connective-reasoning posture (the BECAUSE between evidence + claim)
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Counter
Counterargument — opponent-taking-seriously posture (best version of the other side strengthens yours)
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Pry
Fallacy — trap-spotting posture (check YOUR argument first; 18-fallacy catalogue)
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Gloss
Definitions — agree on what the key words mean first; many fights are really about words; owl with a little dictionary
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Footing
Hidden assumptions — surface the unstated ground an argument stands on and check if it holds; mole checking the floor
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Temper
Qualifiers / scope — match a claim's strength to its evidence; 'usually' survives what 'always' can't; badger with balance-scales
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Onus
Burden of proof — whoever makes the claim supports it; bigger claims need bigger evidence; heron balancing the scales
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Grant
Concession / common ground — grant the true points, find the shared ground, argue the real slice; deer in a shared clearing
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Browse all chapters → · What's distributed-narrative methodology? →
What's inside
Argument Builder
Build arguments by dragging blocks together. Start with a Claim (what you believe), add Evidence (facts that support it), and connect them with a Warrant (the r
Debate Duels
Face off against AI opponents in structured debates. Take turns presenting arguments and challenging each other. Use what you built in the Argument Builder to w
Fallacy Attacks
Learn to spot logical fallacies -- tricks in reasoning that make arguments seem stronger than they really are. When you spot one in your opponent's argument, ca
Evidence Cards
Collect evidence cards from different topics. The stronger and more relevant your evidence, the better your arguments will be.
Mentored by Logos — on-device AI, no data leaves the device.
How ClaimCraft handles your kid's data
- ✅ All progress, settings, and AI-generated content stays on the device
- ✅ No analytics, no tracking, no third-party SDKs
- ✅ Free — no ads, no in-app purchases
- ✅ No personal information collected from children — in line with COPPA (updated by the 2026 FTC amendments)
- ✅ No chat with strangers — play-together rooms use a short code and preset emotes, never typed messages
For you, the grown-up
The grown-up side of ClaimCraft on Spark & Whetstone, our free site for grown-ups: How to Argue Well. They build a claim with a reason and evidence; you check your own the same way.
ClaimCraft runs on ForgeKit — the open-source Swift Package Manager framework that powers every Spark & Anvil app. ForgeKit ensures consistent accessibility, COPPA compliance, and design language across the portfolio, so your kid's progress and preferences feel coherent across every app they touch.
Coming to the App Store
ClaimCraft is in active development. Email us to hear when it ships — no marketing, no spam, just a one-shot launch announcement.
Email me at launch
