Abstract
In order to perceive something, one must have a sense experience which it causes and which has a content that fits it appropriately. But veridical hallucinations show that more is required, viz., that the experience must also be caused by the object of perception in the right sort of way. The best account of what this amounts to is that the object causes the experience by means of a “reliable mechanism,” i.e., a causal mechanism which is generally apt to connect objects to experiences with contents that fit those objects. The paper advances and defends a careful account of this position and its application to the distinction between state of affairs perception, event perception and thing perception.