Back on 23 May on ADS-L, I noted an occurrence (in speech) of “The military can do so much”, clearly intended to mean, in the context, ‘the military can do only so much’ (i.e., not everything, or not a lot, while “the military can do so much” otherwise conveys ‘the military can do a lot’). Not long after, a poster wrote:
If “can do so much” can actually mean “can do only so much”, then perhaps Churchill really meant “Never have only so few owed only so much to only so many”? I don’t think so. The sentence really needs “only” in there to make sense.
This is one version of the “X can’t mean Y” (sometimes “X doesn’t mean Y”) reaction to reports that some people sometimes use X to mean Y: flat rejection of the pairing of form X with meaning Y, usually on the basis that the objector wouldn’t use X that way (grammatical egocentrism). Note that the objection is framed as statement of fact (about the language in general, not just about the objector’s variety of the language), though actually it serves as a normative judgment (that X shouldn’t be used to mean Y).
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