Inside out logic

If you live in Edinburgh, and Edinburgh is in Scotland, then you live in Scotland. This reasoning draws on the containment metaphor, and the transitivity of containment. It is easy to represent as a diagram, eg, as a Venn diagram. If something is in A then it is also in B. The diagram also applies…More

Diagrammatics 101

Drawings, sketches and illustrations belong to the interpretative arts. Then there are diagrams. As iconic signs, diagrams make fewer claims in the realms of creativity and imagination, but they do have to be interpreted. Diagrams are in the company of charts, graphs and tables the authors of which extract the salient features of a phenomenon, show…More

Peirce decoded

Whether or not you agree with C.S. Peirce’s semiotic system, there’s something about his diagrams. A search on Google Images for “Peirce sign categories” reveals an industry of diagrammatic interpretations and reinterpretations that would appeal to anyone with an interest in the cryptographic. I’m going to add to that collection some further abstract diagrams, or…More