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: I'm wondering which one of these expressions is correct? This stuff or these stuff? 
Answer: In your expressions, stuff is a noun and is uncountable. I would say it is "this stuff". The only time I can think of stuff being plural is when it is a verbas in he stuffs the turkey with .

no