Herbert Feigl, The "Mental" and the "Physical": The Essay and a Postscript (1967).
V. Mind-Body Identity. Explications and Supporting Arguments
With due trepidation I shall now proceed to draw the conclusions from the preceding discussions, and to present the denouement of the philosophical tangles. There are many points on which I have sincere and serious doubts. There is yet a great deal of analytic work to be done on several puzzling aspects for which I can at present only sketch the sort of solution which seems to me especially plausible.