  Wittgenstein did not publish any book after the Tractatus, but he wrote and taught; and after his death Philosophical Investigations was published in 1953. The later thought of Wittgenstein bears a similar relation to the Tractatus as Heidegger bears to Husserl. In both cases the quest for a kind of scientific certainty was replaced by the recognition that science is itself just one language, and not in many cases prior by right. The later Wittgenstein employed the notion of different ‘forms of life’ in which different ‘language games’ including those of religion are at home (Philosophical Investigation, §7, 19, 373). In Oxford there was a parallel though distinct development centering round the work of John Austin (1911–60). Austin did not suppose that ordinary language was infallible, but he did think that it preserved a great deal of wisdom that had passed the test of centuries of experience, and that traditional philosophical discussion had ignored this primary material. In How to do Things with Words (published posthumously) Austin labeled ‘the descriptive fallacy’ the mistake of thinking that all language is used to perform the act of describing or reporting, and he attributed the discovery of this fallacy to Kant (How to do Things with Words, 3).