Parfit’s Hitchhiker

https://www.flickr.com/photos/mypubliclands/16358796247
Image: Flickr

Suppose that I am driving at midnight through some desert. My car breaks down. You are a stranger, and the only other driver in this desert. I manage to stop you, and I offer you a great reward if you drive me to my home. I cannot pay you now, but I promise to do so when we reach my home. … If you drive me to my home, it would be worse for me if I pay you the promised reward. Since I know that I never do what will be worse for me, I know that I would break my promise. Given my inability to lie convincingly, you know this too. You do not believe my promise. I am stranded in the desert throughout the night.

— Derek Parfit, Reasons and Persons, 1984

| Oddities · Society

The Tonnetz

https://commons.wikimedia.org/wiki/File:Neo-Riemannian_Tonnetz.svg

In 1739, Leonhard Euler devised a “tone net” to represent graphically the traditional harmonic relationships in European classical music. In the version above, the dark blue triangle at the center is an A minor triad; the red triangle to its right is the relative major, C; and the red triangle below it is the parallel major, A. Every such pattern is mirrored in all the other keys. The tones are numbered from 0 (A♭) to 11 (G). Major triads are red, and minor are blue. The thinnest lines denote minor thirds, thicker are major thirds, and the thickest horizontal lines are fifths. See this page for further relationships.

The heart of the figure, shown in somewhat darker colors in the diagram, is a parallelogram composed of 24 triangles. The top edge of this parallelogram can be joined to the bottom, which lists the same notes in their enharmonic equivalents, and if the resulting cylinder is twisted slightly then its ends can be joined in the same way, forming a torus.

| Art · Science & Math

Sea Battle

https://archive.org/details/the-strand/The%20Strand%20v26%201903/page/478/mode/2up

This is a tug-of-war on the water at Healy’s Lake, Ontario, Canada. The boat is a punt used for ‘cadging’ baggage in the wilderness; the idea of a tug-of-war on the water was the suggestion of Dr. Joel M. Ingersoll, of Rochester, New York. … The left-enders ‘walked away’ with those on the right.

— T.J. Wilstach of New York, in the Strand, October 1903

| Entertainment · Oddities

Math Notes

Multiply 92 by 8, then multiply that product by 8, and so on. List the products, indenting them successively as shown and continuing indefinitely:

		92
		 736
		  5888
		   47104
		    376832
		     3014656
		      24117248
		       192937984
		9999999...

The sum converges to a string of 9s.

From Archimedes’ Lab’s Zoo of Numbers.

| Science & Math

A Show of Hands

I think this is from the 1976 Soviet mathematical olympiad:

Fifty accurate watches lie on a table. Prove that there exists a moment in time when the sum of the distances from the center of the table to the ends of the minute hands is greater than the sum of the distances from the center of the table to the centers of the watches.

Click for Answer
| Puzzles

Brainstorm

In 2015, Canadian politician Sheldon Bergson changed his name to Above Znoneofthe, so that it would appear on electoral ballots as “Znoneofthe, Above.” (The Z, which is silent, ensures that the name will appear last in a list of candidates.)

He ran in an Ontario provincial by-election the following year, winning 0.43 percent of the vote, and has participated in several races since. Amazingly, he’s not the first person to try this.

(Thanks, Alessia.)

| Society

The Theory of Deadly Initials

In 1999, University of California psychologist Nicholas Christenfeld and his colleagues reviewed thousands of state death certificates and found that males with negative initials (D.I.E., P.I.G., R.A.T.) had died 2.80 years younger than matched controls. Males with positive initials (H.U.G., W.I.N., V.I.P.) had lived 4.48 years longer.

Why? “At present, the best available explanation for these findings is that they are due to the symbolic power of one’s name. It seems unlikely that a person with initials like A.S.S. or J.O.Y. could fail to notice the negative or positive connotations.” Suicide and accidents showed the strongest differences between the positive and negative groups.

But a later study by Pomona College economist Gary Smith found no such pattern.

(Nicholas Christenfeld, David P. Phillips, and Laura M. Glynn, “What’s in a Name: Mortality and the Power of Symbols,” Journal of Psychosomatic Research 47:3 [September 1999], 241-254.)

| Oddities

Misc

  • Ajoritsedabi Oreghoyeyere Memaridieyin Okorodudu played basketball for Bucknell in 1980.
  • Spike Milligan said his father’s last word was “Aaargh!”
  • It’s illegal to take a lion to the movies in Baltimore.
  • In 2007 the UK Association of Chief Police Officers’ spokesman on knife crime was named Alfred Hitchcock.
  • “I banged the door with such a slam, / It sounded like a wooden d–n.” — Frederick Locker-Lampson
| Death · Language · Literature · Society