ABSTRACT
A mental event is certainly a Substantive; it is the kind of entity which can be a logical subject of a proposition, but cannot play any other part in a proposition. A mental event is the fact that a certain Pure Ego has a certain determinate form of a certain determinable non-causal quality at a certain moment. On the first theory these qualities directly characterise the Pure Ego, and these relations directly connect the Pure Ego with epistemological objects; on the second theory the qualities directly characterise mental events, and the relations directly connect mental events with epistemological objects. The difference between them and Mr Russell here is simply that he regards sensa as being constituents of physical objects as well as being constituents of minds, whilst they would almost certainly have held that what is a constituent of a mind cannot also be a constituent of a physical object.
