His argument was on the right track, as they say, but like many philosophers, if not all, the was playing with words.
Words are symbols used to communicate by referring to objects and describing them. A word has whatever meaning you assign it. Unless people realize that words can have different meanings to different people, and nobody's definition is "right" or "wrong" by my standards. Words that feel significant like "You" "Love" "Truly" and "Right" are usually just being used really wistfully. If you ask for a definition of love the response if often "The thing that happens when..." or "The feeling you get...". As if Love is something that exists but is yet to be fully discovered or understood, but in reality the definition of a word is however you define it.