Peirce’s diagrammatic solutions to ‘Peirce’s Puzzle’Pietarinen, Ahti-VeikkoDiagrammatic Representation and Inference : 12th International Conference, Diagrams 2021, Virtual, September 28–30, 2021 : proceedings2021 / p. 246–250 : ill https://doi.org/10.1007/978-3-030-86062-2_23 Conference Proceedings at Scopus Article at Scopus Conference Proceedings at WOS Article at WOS