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Full Idea
Neither Aristotelian nor Russellian rules give the exact logic of any expression of ordinary language; for ordinary language has no exact logic.
Gist of Idea
There are no rules for the exact logic of ordinary language, because that doesn't exist
Source
Peter F. Strawson (On Referring [1950], §5)
Book Ref
'The Theory of Meaning', ed/tr. Parkinson,G.H.R. [OUP 1978], p.85
A Reaction
This seems to imply that it is impossible to find precise logical forms, because of the pragmatic element in language, but I don't see why. Even more extreme modern pragmatics (where meaning is shifted) doesn't rule out precise underlying propositions.