[messages] [Module Design] Moving a Piece between Two Fixed Positions via GKC

[Foobarius]

The Zone Name expression is choosing between two possible results based
on a boolean expression, using a Java (well, technically BeanScript)
language feature known as the conditional operator.  It's saying 'if
CurrentZone equals "Left Player Tag" then use the value "Right Player
Tag", otherwise use the value "Left Player Tag" '.

You can see a more complete explanation of this on wikipedia:
https://en.wikipedia.org/wiki/%3F:

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