LogicQuest

Every sneaky argument pulls the same handful of tricks. Learn to spot them, build the truth tables behind clear thinking, and deduce your way through a case — with Inspector Logos in your corner.

Level 1

Open a case

The detective work — the same modes as the iOS app, rebuilt for the browser. A hint appears whenever you get stuck; a wrong answer never costs you anything.

Fallacy Detective Read a real argument and name the trick — Ad Hominem, Red Herring, the Slippery Slope, and more. Logic Lab Build the truth table for AND, OR, NOT, IF-THEN and IF-AND-ONLY-IF. The lab checks every row. Venn Logic Two premises, one conclusion — does it really follow? Use the Venn diagram to decide valid vs. invalid. Set Studio new Read a set like A ∪ B′ and shade the exact parts of the Venn that belong — union, overlap, and “not” all at once. Argument Mapper Take an argument apart: which line is the claim, which are premises, and which is the objection? Debate Arena Both sides make their case — judge how strong each argument’s evidence really is, and catch the ones pulling a trick. Logic Grid new A classic deduction puzzle — read the clues, work the ✓/✗ grid, and crack the one match-up that fits. Rule Detective new Inspector Logos has a secret rule. Build test cards, watch what follows and what breaks, and crack the pattern — reasoning like a scientist. The Rogues’ Gallery Meet every fallacy face-to-face — what it looks like, a real example, and why it’s a trick.

Practice the concepts

16 kits from "what is an argument?" up through truth tables, syllogisms, and real-world reasoning — a short round of questions with a hint whenever you get stuck. Your progress stays on this device.

Meet the cast — the characters who teach this

Each one stands for an idea you’ll practice. Tap a character to read their illustrated story and hear their audio drama.

Explore all the stories →

Privacy & how it works