  The paradigm of the intentional relation that satisfies the orthodox picture is the intentionality of what can be called singular thoughts, namely those true thoughts that are directed towards concrete individuals or particulars that exist in space and time. A singular thought is such that it would not be available—it could not be entertained—unless the concrete individual that is the target of the thought existed. Unlike the propositional contents of general thoughts that involve only abstract universals such as properties and/or relations, the propositional content of a singular thought may involve in addition a relation to a concrete individual or particular. The contrast between ‘singular’ and ‘general’ propositions has been much emphasized by Kaplan (1978, 1989). In a slightly different perspective, Tyler Burge (1977) has characterized singular thoughts as incompletely conceptualized or de re thoughts whose relation to the objects they are about is supplied by the context. On some views, the object of the singular thought is even part of it.  On the orthodox view, part of the importance of true singular thoughts for a clarification of intentionality lies in the fact that some true singular thoughts are about concrete perceptible objects. Singular thoughts about concrete perceptible objects may seem simpler and more primitive than either general ones or thoughts about abstract entities.