Frauchiger-Renner Paradox Clarifies Where Our Views of Reality Go Wrong

“The experiment, designed by Daniela Frauchiger and Renato Renner, of the Swiss Federal Institute of Technology Zurich, involves a set of assumptions that on the face of it seem entirely reasonable. But the experiment leads to contradictions, suggesting that at least one of the assumptions is wrong. The choice of which assumption to give up has implications for our understanding of the quantum world and points to the possibility that quantum mechanics is not a universal theory, and so cannot be applied to complex systems such as humans.”

—Anil Ananthaswamy, “Frauchiger-Renner Paradox Clarifies Where Our Views of Reality Go Wrong.” Quanta Magazine. December 3, 2018.

Probably the clearest explainer you’ll find. The assumptions are that: quantum theory is universal, quantum theory is consistent, and opposite facts cannot both be true. This thought experiment suggests that at least one is false, and depending on which one either leads to positions that quantum theory collapses into classical physics at scale, observer perspective changes results, or the many worlds hypothesis.

Open Questions – Gwern.net

  • “Why do humans, pets, and even lab animals of many species kept in controlled lab conditions on standardized diets appear to be increasingly obese over the 20th century? What could possibly explain all of them simultaneously becoming obese?”
  • “Why does writing in the morning (anecdotally so far) seem to be so effective for writers, even ones who are not morning persons? While programmers, which seems like a similar occupation, are invariably owls?”

—Gwern Branwen. “Open Questions.” Gwern.net. Accessed: November 9, 2018.

I like the idea of open questions. Added a category to this blog to start collecting them.