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: Any situation, any time; this person has always something negative to say about it. It should be a noun or an adjective to describe a person who is a damp cloud walking over every sunshine situations at the cubicle, hoping to drench other people with his miserable comments. I considered "sourpuss" but would prefer something more important sounding, like "misogynist." 
Answer: In British English, "Naysayer" is common for someone who says that something is not possible, won't work, shouldn't be tried, etc.

yes