Place, U. T. (1986-11-06) Do we have intuitive knowledge of what is the case in all possible worlds? Department of Philosophy, University of York, 6 November, 1986.
[Text]  

Place, U. T. (1987-03-10) Do we have intuitive knowledge of what is the case in all possible worlds? Department of Philosophy, University of Leeds, 10 March 1987.
[Text]  

Place, U. T. (1987-10-27). Do we have intuitive knowledge of what is the case in all possible worlds? Department of Philosophy, University College of North Wales, Bangor, 27 October 1987.
[Text]