Today we’ll look at three perplexing sentences that are the verbal equivalent of optical illusions.

• Every man and woman has arrived. Why has? The phrase man and woman denotes a plural subject. Consider the following grammatically sound sentence: The happy man and woman have arrived. Every and happy both function as adjectives that modify man and woman in these almost identical sentences. But every is so powerfully singular that it forces us to say has, despite the plural subject.

• More than one person was involved. Why was? Doesn’t more mean at least two? Yet there is no English scholar we know of who would change the verb to “were involved,” even though we would say, “More were involved than one person.”

Reference books do not offer much help with this conundrum, and the Internet is no help at all. But John B. Bremner’s Words on Words and Theodore M. Bernstein’s The Careful Writer both address the topic. Bremner claims that more than is an adverbial phrase modifying the adjective one, “which is singular and therefore qualifies a singular noun, which takes a singular verb.” That explanation might fly in the rarefied air of academia, but to accept it we must ignore the inconvenient fact that more than one person means “two or more persons,” and would seem to require the plural verb were involved.

Bernstein doesn’t try to justify More than one person was involved as good grammar, just “good idiom.” He says “was involved” is an example of attraction, a linguistic term that accounts for certain incorrect word choices: “The verb is singular ‘by attraction’ to the one and to the subsequent noun [person].” Since “good idioms” often defy logic, we lean toward Bernstein’s interpretation.

• All but one ship was sunk. Another example of “good idiom.” The principles that apply to more than one also apply to all but one. If we separate all from but one, the verb becomes plural: Of the five ships, all were sunk but one.

One is free to endorse elaborate justifications for the validity of More than (or All but) one person was involved. But it is just as reasonable to conclude that this oddity is nothing more than institutionalized
error—people have been saying it wrong for so long that we’ve become used to it, and More than one person were involved, the logical construction, sounds wrong. We see institutionalized error on the march today in ungrammatical usages like “each of them were here,” “neither of you are right,” and “a person should do their best,” all of which we suspect will be standard English in a decade or two, despite the anguished screams of purists.