“Changing and improving are not always the same thing” or “Changing and improving is not always the same thing”
Are both valid? I think the first is the only option, but I have been challenged on this and I can't explain exactly why the second is wrong. It does make sense, I suppose.
If a noun phrase is made of two noun-like words that conjugate differently, then which conjugation do you use? [duplicate]
Possible Duplicate: “Neither Michael nor Albert is correct” or “Neither Michael nor Albert are correct”? Is “either you or [third-person]” followed by a ...