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The Universe of Discourse

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Latest posts

Last updated about 1 month ago

Mystery of the quincunx's missing quincunx

about 1 month ago

A quincunx is the X-shaped pattern of pips on the #5 face...

The fivefold symmetry of the quince

about 1 month ago

The quince is so-named because, like other fruits in the apple family...

A descriptive theory of seasons in the Mid-Atlantic

about 2 months ago

[ I started thinking about this about twenty years ago, and then...

Claude and I write a utility program

about 2 months ago

Then I had two problems… A few days ago I got angry...

A puzzle about balancing test tubes in a centrifuge

2 months ago

Suppose a centrifuge has slots, arranged in a circle around the center,...

Proof by insufficient information

2 months ago

Content warning: rambly Given the coordinates of the three vertices of a...

Seasons in the Mid-Atlantic region

2 months ago

People around here all talk of the seasons as being equal lengths...

Willie Singletary will you please go now?

2 months ago

(Previously: [1] [2]) Welcome to Philadelphia! We have a lot of political...

How our toy octopuses got revenge on a Philadelphia traffic court judge

2 months ago

[ Content warning: possibly amusing, but silly and pointless ] My wife...

Philadelphia Traffic Court

2 months ago

[ Content warning: possibly amusing, but silly and pointless ] My wife...

Does someone really have to do the dirty jobs?

3 months ago

Doing the laundry used to be backbreaking toil. Haul the water, chop...

The mathematical past is a foreign country

3 months ago

A modern presentation of the Peano axioms looks like this is a...