What I'm thinking about today

Euclid’s Elements Book VII Definitions 1 and 2 Def. 1. A unit is that by virtue of which each of the things that exist is called one. Def. 2. A number is a multitude composed of units. NB: I am used to using the word monad instead of unit. Just so as you know.

wrens

Carolina wren screeching outside my window. The outside world still exists! At least, that’s what I think the wren’s song means. I may have to go out and see. And take my trusty binoculars with me to see the Confusing Fall Warblers.