Cavil — Rhetorical Fallacies

Qaizo Studio

About this app

Most arguments are won by the wrong side. Cavil shows you why — one rhetorical fallacy at a time, every day.

Two minutes in the morning. One bad argument, named, decoded, and countered.

WHAT'S INSIDE
• 30+ rhetorical fallacies and growing — Ad Hominem, Strawman, Red Herring, Slippery Slope, False Dichotomy, Tu Quoque, Appeal to Authority, Whataboutism, and more
• For each fallacy: the trick explained, a real-world example you've heard before, and a scripted comeback you can actually say out loud
• Latin name and editorial framing — calm, confident, never academic
• Daily ritual: one card per day, no overload
• Library/Index of all 100 fallacies in Vol. I (more arrive on schedule)
• Practice mode: track your streak, see the last 28 days, count what you've collected

WHO IT'S FOR
• Anyone who's lost an argument they should have won
• Journalists, debaters, students, professionals
• Readers of cognitive science / philosophy / rhetoric
• Anyone who reads news, watches political talk, or works in a meeting

HOW IT FEELS
Less app, more morning paper. Editorial typography (Source Serif). Calm lavender twilight palette. No streaks pressuring you. No gamification noise. Just one fallacy a day, with the comeback your opponent didn't see coming.

WHY CAVIL
Cavil — verb: to make trivial or unfair objections. The rhetorical art of bad faith. We name the move so you can recognize it next time it's used on you.

PRICING
Cavil is free. No ads. No tracking sold to anyone. Premium features arrive later.

PRIVACY
Email (only if you sign in), card progress, and crash reports if you opt in. Nothing else. Full policy: https://qaizo-app.github.io/zerik/legal/privacy.html

PART OF QAIZO STUDIO
Cavil joins Senik (mental models) and Biased (cognitive biases) — three angles on flawed reasoning, one studio, no overlap. The bug in your head, the trick in their mouth, the model in your toolkit.

What’s new

Welcome to Cavil. One rhetorical trick a day — the manipulations hiding in arguments, headlines and ads. Each card breaks down how the trick works, shows a real-life example, and gives you the exact way to counter it. Two minutes a day to stop getting played. 130+ fallacies, and counting.