premise: Doom (stylized as DOOM) is a series of first-person shooter video games developed by id Software. The series focuses on the exploits of an unnamed space marine operating under the auspices of Union Aerospace Corporation (UAC), who fights hordes of demons and the undead in order to survive.
hypothesis: The protagonist of DOOM is named John.
reason: I actually don't know why it would be difficult for the system; 'John' wasn't used anywhere in the info and it specifically says he's unnamed. It's definitely wrong because the protagonist is specifically said to be unnamed, and therefore can't be named John.