In this October 2007 post, I discuss how placement of only in a sentence can affect meaning. Well, here’s another issue relating to use of only—the ambiguity that arises when you use only in language of discretion.
Consider the following sentence:
Acme may close any one or more Contract Stores for any reason, and in doing so it may consider only its own interests.
This sentence is ambiguous. I had intended that it mean that Acme may choose to consider only its own interests but would be free to consider the interests of others. But this sentence could also mean that the only interests Acme is permitted to consider are its own. The latter meaning would, however, seem unlikely.
Now consider the following sentence, lifted from MSCD 3.53:
Widgetco may sell only the 2003 Lincoln Navigator.
This sentence could convey a meaning analogous to the first possible meaning of the previous example—in other words, that Widgetco may choose to sell only that car. But in MSCD, I say, in effect, that this sentence means that the only vehicle that Widgetco is permitted to sell is the vehicle specified. (I wasn’t then attuned to the ambiguity of may … only.) In this case, the latter meaning is the more likely.
The ambiguity engendered by may … only can’t be avoided by repositioning only (not unless you want to ignore the recommendation I make in my October 2007 post regarding placement of only in relation to the verb). Instead, you have to come up with alternative language to express the intended meaning. Here’s how I’d reword the two examples:
Acme may close any one or more Contract Stores for any reason, and in doing so it may elect to consider only its own interests.
Widgetco shall not sell any vehicle other than the 2003 Lincoln Navigator.
The ambiguity engendered by the above examples is related to that engendered by may not in language of prohibition; see MSCD 3.71. And in the case of ambiguity relating to “the part versus the whole,” language of discretion gives rise to additional possible meanings; see for example MSCD 8.7. And may also gives rise to the issues discussed in this June 2007 post. So all in all, using may rigorously requires that you grapple with some fiendishly subtle issues.