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.
One example: Question: What's the difference between the following examples: Neither of my teachers are mathematicians. None of my teachers are mathematicians.
Answer: Neither - not either - implies that there is a choice of only two. So 'neither of my teachers' is only correct if there are exactly two teachers, 'none of my teachers' can be any number.
Solution is here: yes
Explanation: The answer is well in context with the question and gives a proper explanation to resolve it. Hence, the output "yes" is correct.

Now, solve this: Question: If a possessive noun, which is plural, is preceded by "each", then should it use the singular or plural possessive form? For example, which of the following is correct? spend time in each other's presence spend time in each others' presence
Answer: Surely it's always each others Each other is a (reciprocal) pronoun, so in its possessive case it becomes a possessive pronoun. None of the others: its, his, hers, yours, whose etc has an apostrophe. Adding one is generally seen as a sign of poor literacy.
Solution:
no