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Letter: Making sense of quantum cause and effect (3)

Published 10 December 2025

From Rod Newbery, Cambridge, UK

Your feature explores the issue that nothing seems to be fixed until it is measured. Measurement can be an observation. What quantum theory doesn’t explain is that it all depends on who is observing an object. That is why, after I have failed to find a particular object in the fridge, when my wife then opens the door, there it is, right at the front.

Issue no. 3573 published 13 December 2025

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