What are compared are the objects and relations of objects situated in events.

The event considered as a relation between objects has lost its passage and in this aspect is itself an object.
This object is not the event but only an intellectual abstraction.

The same object can be situated in many events; and in this sense even the whole event, viewed as an object, can recur, though not the very event itself with its passage and its relations to other events.
Objects which are not posited by sense-awareness may be known to the intellect.

For example, relations between objects and relations between relations may be factors in nature not disclosed in sense-awareness but known by logical inference as necessarily in being.

Thus objects for our knowledge may be merely logical abstractions.