The question Husserl tries to address with his theory of categorial intuition can easily be exemplified. Let us say I make the claim "The book is lying on the table" or "The table is green." In these expressions occur elements which can be easily fulfilled in sense perception, for example the book, the table, and the green color. But what gives fulfilment to the "lying on the table' or the "being green' of the book? For those intentions directed at "states of affairs' (Sachverhalte), it seems impossible that they could be fulfilled by sense perception alone.