"are you familiar with the phenomenon Samuel Delaney calls 'rupture'?
Rupture occurs when you think you are in the middle of a conversation with someone... and suddenly discover that you've merely been making noises at each other, that there is a previously unsuspected chasm between you beside which the Marianas Trench is a pothole.  We have come to a point of rupture, Joe.  You don't know what I mean, and I'm not sure I understand what you said.  I think we must be using different maps."


Lady Sally to Joe in Lady Slings the Booze, by Spider Robinson

              
to ADD