Practise logic until it clicks
Endless practice in translations, definitions and fallacies. Every answer checked on the spot, every mistake explained. Free, and it works offline.
Exercises6 topics · 13 drills
Syllogistic Logic
Set AAll, no, some: the logic of categories.
Propositional Logic
Set CAnd, or, if-then: the logic of statements.
Modal Logic
Set JNecessity and possibility: box and diamond.
Deontic Logic
Set LOught, permissible, forbidden, and commands.
Belief Logic
Set NBelieving, willing, and what it is rational to believe.
Informal Logic
Sets Q · RDefinitions, meaning, and the classic fallacies.
Frequently asked questions
What LogiCola is, what it costs, and how to use it in class.
Something the list doesn’t answer? Email me. I’m Malik, and I read every message.
LogiCola is the practice companion to Harry Gensler’s Introduction to Logic (Routledge). After Gensler, the original creator, passed away, I rebuilt it for the web to keep an important learning resource alive and to honour his legacy.
No. LogiCola is open source, and the exercises are free, and will stay free. If it helps you, a contribution keeps the platform running and speeds up new content and exercises.
It’s a remake of the 2008 program, rebuilt for the browser: it runs on any device with an internet connection, whatever the operating system. Some chapters and exercises from the original are still missing; they’re being added set by set.
LogiSkor keeps track of student scores from LogiCola. I’m working on a way for teachers to see how their students are doing. Email me if you’d like to try an early version.
The exercises are free and open source, and behind them are years of one person’s work. This release alone took a year: the design, the research behind how the hints teach, every exercise checked against Gensler’s textbook and the original program, and the work of making it run on any device, phones included. It needs looking after too, since browsers keep changing and the drills have to keep working. A donation covers hosting and buys the time for all of that, and it is the biggest help there is. Telling a logic teacher or student about it helps as well.
Yes, that’s exactly what it’s for. The drills follow Gensler’s Introduction to Logic chapter by chapter, so you can assign sets alongside your syllabus. And LogiSkor will let you follow your students’ scores; email me if you’d like early access.