 It is clear that if the above assumptions about presupposition are made, then the presuppositions of a sentence will be the same as the presuppositions of the negation of the sentence. But what about projection from embeddings other than negation? A very simple account of projection is based on the cumulative hypothesis, first discussed by Morgan (1969) and Langendoen and Savin (1971). This is the idea that presuppositions always project from embedding, as if there were no effects like cancellation. A trivalent semantics that yields this behavior is obtained by using the Weak Kleene connectives (Kleene, 1952). Assume (for all the partial/multivalent semantics given in this article) that for classically valued arguments, the connectives behave classically. Then Weak Kleene connectives (also known as the Bochvar Internal connectives) are defined as follows: