
Language Proof and Logic is available as a physical book with the software included and as a downloadable package of software plus the book in PDF format. The all-electronic version is available from Openproof at gradegrinder.net.

This textbook/software package covers first-order language in a method appropriate for first and second courses in logic. The unique on-line grading services instantly grades solutions to hundred of computer exercises. It is specially devised to be used by philosophy instructors...

