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Dave Low wrote:
>
> Okay, this might be totally impossible (or insane or banal), but has anyone
> modelled boolean functions on a train layout (System or Duplo)? At the moment
> I'm thinking "train on the line"=1, "not on the line"=0. NOT could be done by
> reversing the trains direction, OR by having two tracks enter one line at
> points, but what about AND ? Or does AND not make sense given the definitions
> of 1 and 0? Maybe you need "train pushing a wagon"=1...
For those of a mathematical disposition, I vaguely remember an
article on the subject of building computing logics out of train
tracks in 'Eureka' (the annual journal of the Cambridge University
undergraduate math society, the Archimedeans) a few years ago.
The article was by Adam Chalcraft. Unfortunately, I don't have a
copy of the article, but I know Adam, so if anyone is interested,
I can contact him and ask.
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