I have my suspicions. The wheelchair user claimed never to have read a complete book and to know nothing about sport. I can't help thinking there was some juggling to prevent a TV disaster - they must do rehearsals to get an idea of who is likely to get that far.
Yeah, that sounds pretty much what I suspected. I have met a few people who would never get a question right, and sometimes the odd one who never falters, but the TV shows seem to find the mid-ground.