Matt Kaufmann ACL2 Seminar, April 5, 2019 Title: ACL2: Implementation of a Computational Logic Abstract: [This is a dry run of a talk that I will be giving to mathematical logicians in late May. I'll try to adapt it to the audience attending the ACL2 seminar.] ACL2 ("A Computational Logic for Applicative Common Lisp") is a programming language, a first-order logic, and a software system for proving theorems in that logic. In this talk I will provide a sense of what ACL2 is, what can be done with it, and especially what sorts of logical issues can arise when attempting to build a powerful yet sound mechanized reasoning system.