Abstract
The central and defining characteristic of thoughts is that they have objects. The object
of a thought is what the thought concerns, or what it is about. Since there cannot be
thoughts which are not about anything, or which do not concern anything, there cannot
be thoughts without objects. Mental states or events or processes which have objects in
this sense are traditionally called ‘intentional,’ and ‘intentionality’ is for this reason the
general term for this defining characteristic of thought.
Under the heading of ‘thought’ we can include many different kinds of mental
apprehension of an object—including relatively temporary episodes of contemplating or
scrutinising, as well as persisting states like beliefs and hopes which are not similarly
episodic in character. These are all ways of thinking about an object. But even
construing ‘thought’ in this broad way, it is clear that not all mental states and events are
thoughts: sensations, emotions and perceptual experiences are not thoughts, but they are
also paradigmatically mental. Do these mental states and events have objects too? Or
are there mental states and events which have no objects?