 The third assumption gives her the most difficulty, however. She divides it into a number of more specific presuppositions, but what is crucial is the assumption that analysis must be “directed” towards, i.e., end in, what she calls “basic facts”—absolutely simple or atomic facts. Just such an assumption was made in Wittgenstein’s Tractatus as well as in Russell’s form of logical atomism, for example. But once Stebbing has made explicit all these presuppositions, she comes to the conclusion that not only are they unjustified but they are not even very plausible (1932: 86–7).