Ian Grant's Weather Report 8/10/22


Brought to you by Sun Microsystems (1990) and International Computers Limited (1992).




27:33 The parity of the number of white balls in the urn is an example of a hidden variable.

At 28:28 he seems to be inviting us to find an analogue of this existence proof, just as the missionaries and cannibals problem is an analogue of the program in problem 1 (25:00). I think that a good place to look for such a problem would be in Euclid's Elements.

In the first of his two remarks on problem 2 Dijkstra describes a situation in which the metric space (in which the points lie) induces a well-ordering on the points of the phase space in which the one-to-one correspondences of the variable z lie. But this metric space has no necessary connection with the phase space which is the only thing the program actually represents.

See Edsger W. Dijkstra on Reasoning about Processes April 13, 2020 and Norman Wildberger's Five Fingered Gauntlet For Pure Mathematicians.

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