Two objects x and y have weak contact when their complements are not connected and y is connected to the complement of any interior which x is part of. Granularity refinement ('microscopization') eliminates weak contact relations, while this does not happen with external connection, which could be renamed 'strong-contact'.
(=> (Weak-Contact ?A ?B) (And (Not (Exists (?C ?D) (And (T-Complement ?B ?D) (T-Complement ?A ?C) (Connected ?C ?D)))) (Forall (?Z) (=> (Exists (?E) (And (Interior ?Z ?E) (Part-Of ?A ?E))) (Exists (?F) (And (T-Complement ?Z ?F) (Connected ?F ?B)))))))