Substance

Any PhysicalBody that has not necessarily specified (designed) boundaries, e.g. a pile of trash, some sand, etc. In this sense, an artistic object made of trash or a dose of medicine in the form of a pill would be a FunctionalSubstance, and a DesignedArtifact, since its boundaries are specified by a Design; aleatoric objects that are outcomes of an artistic process might be still considered DesignedArtifact(s), and Substance(s).

Substance

Any PhysicalBody that has not necessarily specified (designed) boundaries, e.g. a pile of trash, some sand, etc. In this sense, an artistic object made of trash or a dose of medicine in the form of a pill would be a FunctionalSubstance, and a DesignedArtifact, since its boundaries are specified by a Design; aleatoric objects that are outcomes of an artistic process might be still considered DesignedArtifact(s), and Substance(s).