A constitutional amendment has passed.

[F. Joe Haydn]

This amendment is a failure. It seeks to fix grammatical errors in the Constitution, but in doing so it creates new errors. The amendment repeatedly fixes forms of the pronoun "he" into forms of the pronoun "they". However, this is grammatically incorrect, as a singular pronoun, not a plural pronoun, should be used here. While it is incorrect to just use the male pronoun "he", it is correct to replace "he" with "he or she".

[F. Joe Haydn]

"They" is a singular pronoun

Going by your example, the word children is singular. In reality, it is not singular, just like "they" is not singular. In your sentence, you referred to the word they, which is singular, as there is only one word that is spelled t-h-e-y. If you are using they as a pronoun, like the Constitution is, then it is plural. Here is an example snippet from a sentence in the Constitution: "If they approve of it they should sign it." Since this is talking about one person, the President, the sentence should read: "If he or she approves of it he or she should sign it."

[F. Joe Haydn]

https://en.wikipedia.org/wiki/Singular_they

The singular they is accepted more in informal contexts; however, in formal contexts, like in a Constitution, "he or she" is preferred. I have decided to support the amendment, though, because of a different user pointing out to me that "he or she" is unfair to non-gender conforming people.

[F. Joe Haydn]

"They" is a singular pronoun

Going by your example, the word children is singular. In reality, it is not singular, just like "they" is not singular. In your sentence, you referred to the word they, which is singular, as there is only one word that is spelled t-h-e-y. If you are using they as a pronoun, like the Constitution is, then it is plural. Here is an example snippet from a sentence in the Constitution: "If they approve of it they should sign it." Since this is talking about one person, the President, the sentence should read: "If he or she approves of it he or she should sign it."

"he or she" is unfair to non-gender-conforming individuals though

I hadn't thought of that, but you're right. It's true that "he or she" is unfair to non-gender conforming individuals. I apologize for opposing the amendment, and I now support it because of your thoughtful and insightful comment.