My colleague-in-blogging Ethan Siegel does a regular reader-request feature, and this week's edition drifts into my territory, answering a question about using quantum entanglement for faster-than-light communication. As I jokingly said on Twitter, Ethan's answer is pretty good for an astronomer, but there are bits of it I don't like. Not because he gives a wrong answer-- he correctly notes that it's not possible to use entangled particles to send messages faster than the speed of light-- but be...