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by 323 1674 days ago
It's explained in a comment from a few days ago:

https://news.ycombinator.com/item?id=29283101

From what I understand, in your setup the lightbulb will turn on and quickly turn off, irrespective of the state of the other switch which is 1 yr away. Then after 1 yr passes it will react according to the state of the other switch.