I used to have this neighbor who worked at Loral. Designing spy sats...
We used to have this "language" whereby I would ask him a question while he washed his car.
If he washed left (wax on) it was 'yes' - if washed right 'wax off' it was 'no'
So I would ask him all sorts of questions about the capabilities of the spy sats loral was building and through that simple interaction, was able to learn a lot about sats...
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I have never uttered this story before.