I was just brought up that it was, and so to me it is. Here's an example
http://www.essortment.com/social-etiquette-36808.html
For future reference, perhaps it would be more polite to ask specifically if further clarification is required, then one would not feel ignored if one did not get an answer to the question one did not actually ask 
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The most difficult thing is the decision to act, the rest is merely tenacity Amelia Earhart
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