TASK 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.
PROBLEM: Question: Possible Duplicate: Is it correct to use "punctuation outside of the quotations", or "inside?" I've heard that you should always place ending punctuation inside of quotes, no matter what. Are there any cases where it is appropriate for a sentence to end with ".? 
Answer: Punctuation inside quotes is a rule that was invented by American publishers and is not necessarily followed elsewhere. The original reason had to do with typesetting mechanics and is obsolete. Also, if you're preparing technical texts such as about computer programming, this can result in technically incorrect material. In practice, you are at the mercy of whoever is editing or grading your material. But to answer your question, it can certainly be "acceptable" in many parts.

SOLUTION: yes

PROBLEM: Question: I overheard my manager asking "What are you up to?" What does that idiom mean? Is it an informal/negative way of asking?? 
Answer: "What are you up to?" means "What have you been doing lately?". If you add an adverb to the end of the phrase, for instance, "What are you up to tonight?" or "What are you up to this summer?" it can be interpreted as "What are you planning to do tonight?" or "What are you planning to do this summer?".

SOLUTION: yes

PROBLEM: Question: Does English use the word thou in situations nowadays? For example, to humiliate an opponent by being overly familiar? 
Answer: In a very specific technical usage, yes. "thou" is a jargon abbreviation for "one thousandth of an inch" and crops up in machining. Also, automotive industry has to measure fine tolerances, so older petrol engines may have their spark plug gaps measured in inches and be stated as "50 thou" or similar, and pistons may have tolerances in thou. Any workshop engineer using lathes and fitting parts together closely would be familiar with this term even in metric countries. Modern CNC workshops are much more likely to work in metric. The exception would be Americans who end up working in both measurement systems. Aside, in this context "tenth" means "tenth of a thousandth of an inch" and not "tenth of an inch" It is never said as "ten-thousandth of an inch" because that could be misheard for "ten x thousandths of an inch" (ie a hundredth of an inch) in a noisy machine workshop. The metric equivalent would be microns or micrometres, where "1 thou equals 25.4 microns equals 25.4 micrometres".

SOLUTION:
no