Uphill! Both ways! In the snow! With rabid wolves nipping at your hand while you tried to make solder connections!
I actually had a CAD course where one of the projects was to design circuit traces - we really didn't need to know what the components were, or have any sort of 'tuned' circuit, they just needed to know we could draw the symbols correctly.
Rotten bastard that he was, the teacher included an 'extra credit' assignment that was physically impossible in two dimensions. Of course, this was to teach that 'sometimes you need to tell the engineers they're wrong', blah blah.
Me, I just added a notation for two extra jumper wires.