From Pradeep Mutalik here:
Three puzzles test whether the concept of infinity has purchase in the physical world.
Editor’s note: The reader who submits the most interesting, creative or insightful solution (as judged by the columnist) in the comments section will receive a Quanta Magazine T-shirt. More.
Readers can always submit here if they wish. T-shirt only by arrangement.
See also: New Scientist vs. William Lane Craig on infinity explanations
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