Sunrise, sunset Published on January 27, 2026January 26, 2026 by fivecolorssandt@icloud.com In-between calculations In the twilight land of Spherical Astronomy. . . Read More
Seeking agreement Published on October 7, 2025October 6, 2025 by fivecolorssandt@icloud.com Another step We propose a modification of the Scientific Method. Read More
Analog lessons Published on September 2, 2025September 1, 2025 by fivecolorssandt@icloud.com Doomed ideas (III) A different sort of lesson for this digital age. Read More
What if. . .? Published on July 8, 2025July 7, 2025 by fivecolorssandt@icloud.com Counterfactuals Asking about what might have been can be useful, but is often just a waste of time. Read More
The center of the universe Published on July 1, 2025June 29, 2025 by fivecolorssandt@icloud.com A privileged position A discredited historical myth refuses to die. Read More
Interpolation Published on May 27, 2025May 26, 2025 by fivecolorssandt@icloud.com No longer useful We don’t need to look up things in tables of numbers nowadays. Read More
Small perturbations Published on April 15, 2025April 14, 2025 by fivecolorssandt@icloud.com A big subject We describe how to do something that’s hard. Read More
Specialization Published on January 7, 2025January 5, 2025 by fivecolorssandt@icloud.com Comparative advantage How much should you be able to do, and how well? Read More
Unstated assumptions Published on December 24, 2024December 22, 2024 by fivecolorssandt@icloud.com Conditional probability The assumptions you make without noticing can change the answers you get. Read More
A philosophical essay Published on December 17, 2024December 16, 2024 by fivecolorssandt@icloud.com Many topics A mathematical essay turns out to have much more than mathematics in it. Read More