He was already on my History by Letter - X quiz! And come on, I managed to squeez 20 answers out of that one and this non-history quiz you only got 17?
Yes indeed. Although the question could be worded a little better, because the whole of XKCD isn't answering hypothetical questions. Most of it is just hilarious math-y and science-y comics, and there's a part of it called "What If?" dedicated to answering hypothetical science questions.
Sorry to complain but xanax is a trade name and should NOT appear in any jetpunk quiz unless you wish to be accused of covert advertising for the company which markets this particular brand of Alprazolam. Please remove this question.
Xavier is before Xavi, so everyone that know Xavier will get Xavi. Perhaps switch them around if you wish to keep both of them. (without Xavier atleast 13% knew Xavi, personally I doubt if that would be much higher ;) )