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 referring to the peculiar habit I sometimes see in formal documents, where a number is given numerically after it's spelled out. It seems quite redundant: I need five (5) kumquats, stat! (Though it isn't always in a legal context, might it be related to this answer on this question?) 
Answer: The redundancy is presumably intended to reduce typos, forgery, and other types of error or manipulation in order to make the intent as clear as possible. It is known professionally as a CYA. It's obvious what my intent is when I rather carelessly write an I.O.U. for sevum kumquats, but alas, sevum is not really a word and opens up our contract to litigation. Adding the numeral 7 in parenthesis after sevum clarifies the intent. Similarly, if I were to write an I.O.U. for 3 kumquats, one could easily change that 3 to an 8, but it is far more difficult to make three look like eight. The practice appears to be a legal tradition rather than a universally honored rule. If you've ever written a check (known as a cheque to the Queen), you've written out a number with words and followed it with a numeral (albeit without parenthesis).

yes