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.

[EX Q]: Question: There are many English words with silent letters, words like gnome or island that are spelt with consonants that aren't pronounced, but are there any words that work the other way round, with a pronunciation that includes extra sounds or syllables that are not in the spelling? I can't think of any real examples, hence this question, but a made-up example would be if gnome were spelt nome but pronounced with a g at the start. Or if people started pronouncing offer as "ofter" as a sort of weird parallel to after. Note: I don't mean words like rough, where the f sound is spelt gh, because in those cases the spelling does still include letters (however seemingly illogical) for each of the sounds. 
Answer: The name "Stephen" is pronounced as "Steven", that is, "ph" is pronounced "v", which is unexpected. Some notes: "ph" is normally pronounced "f", and both "v" and "f" are labiodental fricatives, so this strange pronunciation doesn't come entirely out of the blue. The name can also be spelt "Steven" (e.g. Steven Tyler), thus matching the pronunciation. Admittedly, this is not exactly what you are asking for (it's like "colonel", where "lo" is pronounced as an "r"), but since you consider colonel "in an adjacent neighbourhood", you might be interested in "Stephen" as well.
[EX A]: no

[EX Q]: Question: What is the meaning of wrt in the following text? I think this is an excellent idea, but I'd like to see this explicitly reframed under the banner of providing Drupal.org data through publicly-accessible APIs. We started kicking off at least one discussion like that wrt Git over, which also led back to "#112805: XML-RPC Interface". 
Answer: WRT is an abbreviation that stands for with respect to or with regard to.
[EX A]: no

[EX Q]: Question: As generally agreed and as extensively discussed in this question, "an" should be used in place of the more common "a" where the following word begins with a vowel sound. I have just encountered for the first time an instance of the phrasing an mule in the book Why Chemical Reactions Happen (James Keeler and Peter Wothers, Oxford University Press, 2003). (This book is not mine. I was sitting opposite a friend when the friend mentioned the unusual phrasing.) This phrasing appears to contradict the rule discussed above, since "mule" is, as far as I am aware, pronounced /mjul/ (see Wiktionary). Here is the context. The author is using an analogy to explain a chemistry concept (the italics are not mine, but the bold emphasis is): A useful analogy here is that of an mule, which we get by crossing a horse with a donkey. To describe an mule as a horse or a donkey would be inaccurate and it certainly does not interconvert rapidly between the two! Rather we need to recognize that although an mule has parts that are reminiscent of a horse and parts that a reminiscent of a donkey, it is something altogether different. Looking for other examples online, I have managed to find one on Wikipedia's List of Siege engines. Discussing a Siege engine, the Scorpio: Similar to the ballista, but smaller. Was sometimes mounted on an mule-drawn cart. Other examples are difficult to find, but here's one from a user-posted question on Answers.com (referring, notably, to a kind of deer rather than the animal, a mule): Is an mule deer an omnivore? No. Mule deer are herbivores. ... What is going on? Is there an irregular pronunication of "mule" of which I am not aware? Is this some strange language quirk, some archaic spelling that I am encountering for the first time? 
Answer: It's just a typo, and it probably originally said "an ass". That would have been changed because it's incorrect (an ass is a donkey, not a horsedonkey cross) and, even if it were correct, the fact that ass means well, you know, ass, might be distracting enough to make it worth changing. Another source of this kind of typo is when an adjective has been added or removed and the article hasn't been updated (e.g., "an elephant" becoming "an big elephant" or "an amazing coincidence" becoming "an coincidence"). That's presumably not happened in this particular text, since there are several instances of "an mule".
[EX A]:
no