[setBoolean]

Wouldn't it be possible that the wife looked up the flag topic on Google after the discussion and that it got mixed up as both devices shared the same (external) IP during that time? And because of that you got this suggestion? Just playing devils advocate here.

[dotancohen]

That is completely possible, and I did ask her. She, and the kids, say that they hadn't.

And honestly, I don't think that they had anyway. Maybe one of the kids will take an interest in dad's boring facts about the world at dinner, but the wife has long since stopped even listening!