Natural Deduction

Play with this app and build some proofs in natural deduction style.
Clicking on a formula automatically expands it with possible rules.
Assumptions are printed in blue. Selected one of them generates a new subtree.
Attaching two trees is done by dragging the root of the first one to the leaf of the second one.
If there only one possibility, this attachment is performed automatically.
The proof is done when the tree is surrounded by a red rectangle.

Have fun! Logic is fun
Read more
4.3
6 total
54
4
32
2
1
Loading...

What's New

Better display
Read more

Additional Information

Updated
May 7, 2015
Size
1.1M
Installs
1,000+
Current Version
1.5
Requires Android
2.2 and up
Content Rating
Everyone
Permissions
Offered By
Laurent Théry
©2018 GoogleSite Terms of ServicePrivacyDevelopersArtistsAbout Google
By purchasing this item, you are transacting with Google Payments and agreeing to the Google Payments Terms of Service and Privacy Notice.