H. P. Grice on G. E. Moore on O. Strachey on 'if'

This view as to what φA . ent . ψA means has, for instance, if I understand him rightly, been asserted by Mr. O. Strachey in Mind, N.S., 93; since he asserts that, in his opinion, this is what Professor C. I. Lewis means by “φA strictly implies ψA,” and undoubtedly what Professor Lewis means by this is what I mean by φA . ent . ψA. And the same view has been frequently suggested (though I do not know that he has actually asserted it) by Mr. Russell himself (e.g., Principia Mathematica, p. 21). I