Install ladr4-apps by entering the following commands in the terminal:
sudo apt update sudo apt install ladr4-apps
Description:
the LADR deduction library, miscellaneous applications
LADR (Library for Automated Deduction Research) is a library for use in constructing theorem provers. Among other useful routines it provides facilities for applying inference rules such as resolution and paramodulation to clauses. LADR is used by the prover9 theorem prover, and by the mace4 countermodel generator. . This package provides miscellaneous LADR applications.
Homepage: http://www.cs.unm.edu/~mccune/mace4/
Version: 0.0.200911a-2.1build1
Section: universe/math