The intrinsic character of an event-particle is indivisible in the sense that every abstractive set covered by it exhibits the same intrinsic character.

It follows that, though there are diverse abstractive elements covered by event-particles, there is no advantage to be gained by considering them since we gain no additional simplicity in the expression of natural properties.
These two characters of simplicity enjoyed respectively by event-particles and puncts define a meaning for Euclid's phrase, 'without parts and without magnitude.' It is obviously convenient to sweep away out of our thoughts all these stray abstractive sets which are covered by event-particles without themselves being members of them.

They give us nothing new in the way of intrinsic character.

Accordingly we can think of rects and levels as merely loci of event-particles.

In so doing we are also cutting out those abstractive elements which cover sets of event-particles, without these elements being event-particles themselves.