  Note that this consequence of Mally’s theory does not violate any logical principle because (a) being determined by F does not imply instantiating F, and (b) not being determined by F does not imply being determined by non-F. There are objects that are not determined by a property F, but which are also not determined by non-F; as noted above, the triangle is not determined by being right-angled, but it is also not determined by being non-right-angled; the triangle is only determined by being triangular.