that "Murphy" is "De Morgan" misremembered = that "Murphy" is misremembered as "De Morgan" ?
Context:
Mathematician Augustus De Morgan on June 23, 1866 "Supplement to the Budget of Paradoxes," The Athenaeum no. 2017 page 836 col. 2 [and later reprints: e.g., 1872, 1915, 1956, 2000] wrote: "The first experiment already illustrates a truth of the theory, well confirmed by practice, what-ever can happen will happen if we make trials enough." In later publications "whatever can happen will happen" occasionally is termed "Murphy's law," which raises the possibility—if something went wrong—
that "Murphy" is "De Morgan" misremembered (an option, among others, raised by Goranson on American Dialect Society list)[2]
More:
http://en.wikipedia.org/wiki/Murphy's_law