For reasons only known to the Internet Gods, this question has been asked hundreds, if not thousands, of times – and, in the process, transformed from a silly hypothetical into a full-blown meme. The “horse-size duck vs duck-size horses” quandary apparently originated with a 2003 reader letter to the U.K.’s Metro newspaper, but the theoretical battle scenario rose to national prominence last August after a Reddit user posed the question to President Barack Obama during his “Ask Me Anything” interview with the community. Alas, the president ignored the question – but plenty of others have given their take, from “Mythbusters”...