 The traditional neutral monists reject  (5),  but many of their formulations suggest otherwise. It is easy to find passages saying that a given neutral entity is physical and mental. A sympathetic reading of these passages suggests that they are best understood as an abbreviated way of saying that this neutral entity is a member of two groups of neutral entities, one of which counts as physical, the other of which counts as mental. The terms “physical” and “mental” apply to groups of neutral entities, not to individual neutral entities, as Russell points out when speaking about the mental: 