Automatic formative assessment of exercises on knowledge representation in first-order logic

I present a formalization in Isabelle/HOL of the resolution calculus for first-order logic with formal soundness and completeness proofs. To prove the calculus sound, I use the substitution lemma, and to prove it complete, I use Herbrand interpretations ...

Superdeduction is a formalism closely related to deduction modulo which permits to enrich a deduction system (especially a first-order one such as natural deduction or sequent calculus) with new inference rules automatically computed from the ...

Kolmogorov introduced an informal calculus of problems in an attempt to provide a classical semantics for intuitionistic logic. This was later formalised by Medvedev and Muchnik as what has come to be called the Medvedev and Muchnik lattices. However, ...