Swammerdami
Squadron Leader
Sabine Hossenfelder is one of my favorites. She's knowledgeable and is turning out interesting YouTubes by the bushel. She's happy to review new ideas and offer her own opinions.
She and I both agree that Nicolas Gisin's idea is a far-fetched way to explain quantum theory. But he is a professor specializing in quantum cryptography etc. so is orders of magnitude more expert than I. This video, titled "This physicist says we're using maths entirely wrong" is Sabine's explanation of, and attempted debunking of, Gisin's idea.
Gisin's idea, according to Sabine, is that the past is certain but the future hasn't been constructed yet. And only constructible numbers can be constructed in the real world; this excludes most real numbers. Sabine doesn't mention Kronecker but he was one of the first modern mathematicians to reject non-constructible math.
Google's AI tells me
Kronecker was born 1823 and died 1891, which we called "19th century" in older less enlightened times. Omigosh, AI is driving cars and drawing women sexier than Miss Zanzibar, but never figured out that the 18th century is the 1700s!?!? (I am ... er ... disappointed in many of Google's AI summaries, and have celebrated this one with a screen-shot attached below.
Sabine doesn't start her story about the Intuitionist school of mathematics with Kronecker, but with Luitzen Brouwer. Two of the very greatest mathematical physicists of the 20th century -- Henri Poincaré and Hermann Weyl (at least in his youth) -- were also Intuitionist, rejecting indirect proofs (though not infinite sets).
Sabine is not afraid to tackle topics that have nothing to do with theoretical physics. "Civilization as we know it is ending, prominent forecaster says" is another she debunks. The alleged crackpot builds on a theory by Crawford Holling that many systems, including human civilizations, cycle through four phases. I'll quote AI Overview again!
Anyway, the alleged crackpot thinks our present civilization has already entered the Breakdown phase. I'm afraid he's right, but then my neurotransmitter mix seems naturally disposed to pessimism.

She and I both agree that Nicolas Gisin's idea is a far-fetched way to explain quantum theory. But he is a professor specializing in quantum cryptography etc. so is orders of magnitude more expert than I. This video, titled "This physicist says we're using maths entirely wrong" is Sabine's explanation of, and attempted debunking of, Gisin's idea.
Gisin's idea, according to Sabine, is that the past is certain but the future hasn't been constructed yet. And only constructible numbers can be constructed in the real world; this excludes most real numbers. Sabine doesn't mention Kronecker but he was one of the first modern mathematicians to reject non-constructible math.
Google's AI tells me
Yes, Leopold Kronecker, an 18th-century mathematician, is known for saying, “God created the integers, all else is the work of man”



Sabine doesn't start her story about the Intuitionist school of mathematics with Kronecker, but with Luitzen Brouwer. Two of the very greatest mathematical physicists of the 20th century -- Henri Poincaré and Hermann Weyl (at least in his youth) -- were also Intuitionist, rejecting indirect proofs (though not infinite sets).
Sabine is not afraid to tackle topics that have nothing to do with theoretical physics. "Civilization as we know it is ending, prominent forecaster says" is another she debunks. The alleged crackpot builds on a theory by Crawford Holling that many systems, including human civilizations, cycle through four phases. I'll quote AI Overview again!

Google AI starts the cycle at 'Growth' but I've changed to the ordering in Sabine's YouTube.The four phases of the adaptive cycle, as described by C.S. Holling, are:
- Exploration
A phase where the system reorganizes and restructures, and there's high potential for innovation.- Growth
A phase of rapid growth and resource accumulation.- Maturity
A phase where resources are accumulated more slowly and the system becomes more rigid and less resilient.- Release (aka Breakdown)
A phase of rapid change or collapse, where tightly bound resources are released.
Anyway, the alleged crackpot thinks our present civilization has already entered the Breakdown phase. I'm afraid he's right, but then my neurotransmitter mix seems naturally disposed to pessimism.
