Encyclopedia of logical fallacies
About this app
Prepare to battle against the sophists of the world with this beautiful app.
Steel yourselves, and begin to defend your mind from the language used against you by the sophists of the world.
They are many, we are few, but with the Logical Defense app, we now have an extra tool in our box of rationality. Use this app to quickly look-up the logical fallacies we face when debating against the irrational. Call out those who are logically flawed and help to build a more rational society.
Honesty is the first virtue, so let's be painfully honest towards those who attempt to use language as a form of mental abuse. Never accept a logical fallacy, attack the attacker, and spread logic and reason to those you love.
Ok, enough rambling. This is an app that displays a list of the logical fallacies that haunt every rationalists' mind.
Some features:
- Left drawer that houses categories. - Share function -> Long press a fallacy to share it. - Nice about screen. - Language selection function.
This is a fully open-source project (GNU v2), and the source is hosted on GitHub so feel free to fork me :)
Feel free to leave your comments/suggestions. Thank you for downloading!
Licensed under GPL-2.0-or-later, by LukeStoneHm.
What's New in v2.0.1
Imported from the F-Droid repository index.
Version history
Apr 17, 2025 · 20 MB · Android API 21–34 · code 25
Imported from the F-Droid repository index.
SHA-256 6f7a6af0fe4a333acdcf0271e46bb739276b3b9fc677df50e05f0a2175b81a48
Apr 23, 2017 · 1.7 MB · Android API 16–25 · code 22
Imported from the F-Droid repository index.
SHA-256 3f3872a9962224302bb9e51036d2702382cf42cbe90575e958a1c679ed2d3d63
Apr 4, 2017 · 1.7 MB · Android API 16–25 · code 21
Imported from the F-Droid repository index.
SHA-256 9f522949fb4e24bba9a4d0668bb129d8fac025e17a4719e427e6a60c379cfb4d
Will it run on your device?
87%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be za.co.lukestonehm.logicaldefence is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 1.5.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Logical Defense first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Logical Defense, and a listing is removed when the evidence for it stops holding up.
Get Logical Defense
Every source we list for za.co.lukestonehm.logicaldefence is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
6f7a6af0fe4a333acdcf0271e46bb739276b3b9fc677df50e05f0a2175b81a48
Signing certificate
573c2762a2ff87c4c1ef104b35147c8c316676e5d072ec636fc718f35df6cf22
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
Report a problem with this listing
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