Tags and keywords
It seems there a mutually exclusive possibilities, represented by value properties
isErecting:Boolean. The blocks
GregorianReflector redefine these both for erecting telescopes.
Once could question whether describing every kind of
Image as 'inverted' makes sense. What does it mean to invert the image from a neutrino telescope? So
isInverted:Boolean[0..1] is not mandatory at the highest level of abstraction.