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.

Question: I often hear US citizens say something like this: <Some phrases>. Period. What does period mean when it appears in a sentence by itself in this type of situation? 
Answer: A period is what the full stop is called in American English. Saying period at the end of a sentence is a way of expressing the finality of what is being said. For example, A: But phones are good for taking pictures. B: No, I don't think so. Phones should only be used for communication, period.
yes

Question: I have been using the term ofcourse ever since kindergarten. However, I recently stumbled upon a site that claims of course is how the term is correctly used and not ofcourse. I would like to seek the community's opinion about which is the correct usage of that term. 
Answer: I just checked Merriam-Webster dictionary and it has ofcourse defined as a 'matter of course', i.e. a natural flow of events.
no

Question: This is similar to a palindrome but, instead of a word/sentence that reads the same forwards and backward, is there a word for words/sentences that read the same right side up and upside-down? See picture below where the word "yeah" is written in cursive: 
Answer: That is called an ambigram. It is a typographical design that can be read in more than one direction. ambigram noun A typographical design consisting of text modified in such a way that it can be read in multiple orientations, as in mirror image, inverted, or when rotated. (ODO) Famously (?) used in Dan Brown's Angels and Demons.

yes