A colleague of mine asked me, "Can we say 'My favorite food is hamburgers.'"
I said of course it is correct. But she said a native speaker says it is wrong. It should be "My favorite food is the hamburger."
I know there are some similar questions here answered before. in this post: Subject/Complement Agreement. How to describe problem with "The thing is/are the objects."
The only agreement rule is that finite verbs must agree with their subject. Period. There is no such thing as “subject–complement” agreement in English, be it grammatical or notional. The problem is the horses is perfectly normal, standard, and correct in all possible ways, and therefore since your question is based on a false premise — that there is some sort of “problem” with that form — it can have no possible answer. – tchrist ♦ Jul 25, 2014 at 17:18
It is what I think. I just want to see what you guys think here and now.