This approach typically involves eschewing philosophical "theories" in favor of close attention to the details of the use of everyday "ordinary" language. It is sometimes associated with the later work of Ludwig Wittgenstein and a number of mid-20th century philosophers that can be split into two main groups, neither of which could be described as an organized "school".[2] In its earlier stages, contemporaries of Wittgenstein at Cambridge University such as Norman Malcolm, Alice Ambrose, Friedrich Waismann, Oets Kolk Bouwsma and Morris Lazerowitz started to develop ideas recognisable as ordinary language philosophy. These ideas were further elaborated from 1945 onwards through the work of some Oxford University philosophers led initially by Gilbert Ryle, then followed by J. L. Austin.