A counterexample to Weak Supplementation

The Company axiom of mereology holds that an object cannot have only one proper part. This is a weaker version of the (Weak) Supplementation axiom which holds that if an object has a proper part, it has another proper part that doesn’t overlap the first. Say that an object is simple at a time t provided that its instantaneous temporal part at t is simple. Suppose we accept that: fundamental…