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.

[Q]: Question: Somehow I am compelled to use the word "metal" to describe strong "intestinal fortitude", and perseverance however I can't find the spelling or any synonym like this. Does a word that sounds like "metal" exist when describing an individual's character? I'm looking for modern or historic usage of the word.
Answer: Mettle Defined by Oxford Dictionaries as: a person's ability to cope well with difficulties; spirit and resilience. It is commonly seen in the phrase: (put someone) on their mettle meaning, (of a demanding situation) test someone's ability to face difficulties. 'there were regular public meetings where local MPs were put on their mettle and remorselessly pilloried' Source: ODO Other constructions are possible too, for example: test their mettle, apparently an American version (thanks, @PeterCordes) show your mettle, etc. Origins According to Merriam-Webster, mettle was, as @Sparhawk points out in the comments, originally simply a variant spelling of the word metal (which dates to at least the 13th century), and it was used in all of the same senses as its metallic relative. Over time, however, mettle came to be used mainly in figurative senses referring to the quality of someone's character, with a first known usage in 1581. Today, both words can mean "vigor and strength of spirit or temperament," but only metal is used of metallic substances.
[A]: yes

[Q]: Question: This question, "Discrete Units of a Continuous Quantity", asks whether units of a continuous quantity should be spoken of as discrete or continuous. The top answer states The rule is simple, and you obviously know it: discrete quantities require the use of "fewer" and continuous quantities require the use of "less". Calorie, as a unit, requires the use of "fewer". Energy, as a continuum, requires the use of "less". "Fewer calories means less energy." I do not understand the logic here though. Calorie is a unit, yes, but it is a continuous unit (it is possible to have half a calorie, or 4.582394 calories). Since a calorie is such a small unit of energy compared to what it is usually used for (food energy and human metabolism), it is very seldom expressed in a fractional form and instead is rounded (usually to the nearest 10 or higher). Why then should "fewer" be used with calorie instead of "less"? Is there another relevant rule than just "continuous quantities use "less" and discrete quantities use "fewer"?
Answer: Divisibility does not mean something is not countable or that it isn't a discrete unit, requiring use of 'fewer'. A calorie is not 'energy' it is a 'unit of energy', and therefore, countable and discrete, even though it's divisible. It's divisible into further discrete units - half a calorie, in this case, is still a discrete unit. Using another example, you would have 'fewer' jars of peanut butter, even though someone might have eaten half of the peanut butter in some of the jars. You could even cut the entire jar in half, none of that matters, you still have fewer jars. And you also have less peanut butter, in the same way that fewer calories means less energy. The calorie corresponds to the jar, not to the peanut butter (that would correspond to the energy the calorie measures). It doesn't matter that there is 'less' peanut butter in some jars than in others any more than it would matter if some of the jars were a gallon in size, and some were just single-use jars with two tablespoons of peanut butter inside. Put another way, your 'half a calorie' is still a unit, and thus, you'd still say 'fewer calories'.
[A]: yes

[Q]: Question: In conversation sometimes I'll say something like this: What's that do? which uses "s" as a contraction for "does". Is this a "real" contraction, or is it incorrect usage of a contraction?
Answer: According to Merriam-Webster and Dictionary.com, "what's" is short for: "what is" (What's the matter?) "what has" (What's happened to the car?) "what does" (What's that mean?) So it appears that "What's that do?" is grammatically correct. Merriam-Webster: what's Dictionary.com: what's.
[A]:
yes