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: This year there were: many more people much more people Alternatively: many fewer people much fewer people Which is considered better English? 
Answer: According to Google Books Ngram Viewer, COCA, Ludwig and storywrangler, "many more people" is much more frequently used than "much more people". A search on the NOW corpus shows that "many more" modifies countable nouns while "much more" is followed by uncountable nouns in most cases. Grammatical rules do not work here. In "many more people", "many" pretends to function as an adverb, but in fact it is still an adjective. Keep in mind that language is not science. If many people use "many more people ", it will be grammatically correct eventually.

no