An object and its complement have a so-called 'intermediate' contact: only their complements are connected. Under granularity refinement ('microscopization') this relation may not be defeasible.
(=> (Intermediate-Contact ?A ?B) (And (Exists (?C) (And (T-Complement ?A ?C) (Identity ?C ?B))) (Not (Connected ?A ?B)) (Exists (?D ?E) (And (T-Complement ?B ?E) (T-Complement ?A ?D) (Connected ?D ?E)))))