Congratulations and Yeyasher Kochachem to the co-winners of the Best Answer Contest for the second quarter of 5777!
Here are the original citations, submitted by msh210, mevaqesh, and Isaac Moses, respectively:
HodofHod's answer about the Touro Synagogue's trap door shows a good deal of research into authoritative sources.
DoubleAA's answer about the correct identity of marror, and the history of the usage of horseradish.
mevaqesh's answer to Source that hearing the Megillah does not require Hebrew understanding? traces the rule in question from the Mishna down to the Shulchan Aruch, providing clear references, quotations with translations, and on-point, succinct explanations along the way. It's an exemplary response to a "what is the source for ..." question.
The winning entries will split the 300-point bounty prize evenly.
Best answer contest: Third quarter of 5777, covering Nisan through Sivan, 5777 (from March 28, 2017 through July 1, 2017), is already underway. If you see a new great answer, please enter it!