Definition: Given the Question and Answer pair, detect whether the answer is acceptable or not. Denote acceptable answer as "yes", otherwise denote as "no". An acceptable answer is consistent with the context in question, detailed, long, and uses general knowledge of English. Answers that are not definite and suggest a variety of options are not acceptable answers.
Input: Question: How can I explain to people that the phrase off of is grammatically incorrect? I've heard this phrase used a lot, especially by Americans (though they aren't the only ones). In my understanding, off of should usually be replaced by off, as in, I took the book off the shelf as opposed to I took the book off of the shelf Am I wrong? Or is there perhaps some simple way I can explain this to most people? 
Answer: In my opinion, if you mean to say, "off of", then you should instead say, "from". For example, "Take the book off of the bookcase", when, "Take the book from the bookcase", is preferable. As I understand it, the expression "off of", is an Americanism, but the pseudo-antonym, "on of", is rarely (if not never), found in any language as far as I am aware.

no