24.2 This property of 'conveying' an object is fundamental in the recognition of perceptual objects. It is the chief example of abnormal perception of sense-objects. It is already well-known in the theory of art-criticism, as is evidenced in such phrases as 'tactile-values' or again in such simple phrases as 'painting water so that it looks wet.' The conveyance of a perceptual object by a sense-object is not primarily a judgment. It is a sensuous perception of sense-objects, definite as to situation but not very determinate as to exact character. Judgments quickly supervene and form an important ingredient of what may be termed 'completed recognition.' These judgments will be called 'perceptual judgments.' 24.3 Thus in the completed recognition of a perceptual object we discern (i) the primary recognition of one or more sense-objects in the same situation, (ii) the conveyance of other sense-objects by these primary recognitions, and (iii) the perceptual judgment as to the character of the perceptual object which in its turn influences the character of the sense-objects conveyed. The content of the perceptual judgment is (i) that an analogous association of sense-objects, with 'legal' modifications and in the same situation as that actually apprehended, is recognisable from other percipient events, and (ii) that the event which is the common situation of these associations of sense-objects, recognised or recognisable, is an active condition for these recognitions. 24.4 The situation of a perceptual object is what we call the 'generating' event among the active conditions for the associated sense-objects, provided that the perceptual judgment is correct. If the perceptual judgment is false, the perceptual object as perceived is a delusion. The situation of a non-delusive perceptual object is independent of any particular percipient event. 24.5 Amid the development of events the same non-delusive perceptual object may be perceived in a developed situation, again with 'legal' modifications of the association of perceived sense-objects. The verbal analysis of what constitutes a legal modification of the association without breach of the essence of the observed permanence would be impossibly complex in each particular case; but the judgment as to what is allowable in modification is immediate in practice, apart from exceptional cases. A non-delusive perceptual object will be called a 'physical object.' It is an essential characteristic of a physical object that its situation is an active condition for its perception. For this reason the object itself is often named as the cause. But the object is only derivatively the cause by its relation to its situation. Primarily a cause is always an event, namely, an active condition.