Today, across the dailies
Three daily surfaces I run, each on its own audience — a word and where it came from, a U.S. patent worth looking at, a paradox worth re-reading. Three independent rotations; this page is the editorial home that pulls today's pick from each. The dailies live where their readers find them; this is where they sit together.
essay
Before "essay" meant a literary form, it meant a weighing. From Late Latin exagium — the act of putting a thought on a balance and watching it move. Montaigne kept the original sense.
Classifying Apparatus and Method
The barcode. Filed October 20, 1949; granted October 7, 1952. Woodland conceived the design on a Miami Beach as a graduate student — he traced four lines in the sand, drawing on Morse code's logic of dots and dashes. The original patent shows a bullseye (concentric circles), readable from any angle. The linear UPC code came later (Laurer, IBM, 1973). The first product scanned in a real store was a 10-pack of Wrigley's Juicy Fruit gum, June 26, 1974, Marsh Supermarket, Troy, Ohio. The pack is in the Smithsonian.
The Ship of Theseus
The Athenians preserved Theseus’s ship by replacing rotting planks with new ones. After every plank had been replaced, was it still the same ship?
Hobbes added the harder version: someone collects the discarded planks and rebuilds the original. Now there are two ships, each with a claim. The puzzle isn’t really about ships — it’s about what makes any persisting object (a city, a forest, a person) the same thing across time. Modern philosophers split into psychological-continuity, physical-continuity, narrative or social-recognition theories, and the four-dimensionalist view that the ship is a sum of temporal parts and the question dissolves. None of the answers feels obviously right when you try to apply it to yourself. The cells in your body have all turned over many times. So has the language you think in.