Jon Barwise was unique amongst logicians in leading engagement between logic and other disciplines, notably linguistics, computer science, and the several disciplines concerned with diagrams. My main contact with Jon was through working on cognitive analyses of the learning processes of students being taught logic using Hyperproof, the heterogeneous environment he and John Etchemendy designed. This talk will trace some of Jon’s enthusiasms for interdisciplinary interactions in this area. I hope the audience will contribute as much or more than the speaker.