There have been arguments against extended simples. Arguments include variants on Lewis' argument from temporary intrinsics, as well as arguments that intuitively an extended object must have, for instance, a right half and a left half, and thus have parts (cf Zimmerman 1996: 10) Similarly, one who endorses the Doctrine of Arbitrarily Undetatched Parts, which states that necessarily, if an object occupies region "R" then every occupiable proper sub-region of "R" is exactly occupied by a proper part of that object (see van Inwagen 1981), might use that principle in an argument against the possibility of extended simples.