number of lectures which were attended by Gilbert Ryle...." MichaelDummett(英语:MichaelDummett), Origins of Analytical Philosophy, Bloombury, 2014, p. xiii;
philosophy of arithmetic and logic. MichaelDummett, 1973. Frege: Philosophy of Language. Harvard University Press. MichaelDummett, 1991. Frege: Philosophy of
American Philosopher, University Of Chicago Press, 2008, p. xxix. Dummett, Michael A. Origins of analytical philosophy. Cambridge. Mass.: Harvard University