Stupid Questions (10/​27/​2014)

I think it’s past time for an­other Stupid Ques­tions thread, so here we go.

This thread is for ask­ing any ques­tions that might seem ob­vi­ous, tan­gen­tial, silly or what-have-you. Please re­spect peo­ple try­ing to fix any ig­no­rance they might have, rather than mock­ing that ig­no­rance.