While the interviewer is definitely to blame for not preparing, it is not _that_ bad of an answer for an informal debate. If I claimed that many tweets containe

While the interviewer is definitely to blame for not preparing, it is not _that_ bad of an answer for an informal debate. If I claimed that many tweets contained the letter e, and my opponent asked me to give them an example, just one example. I wouldn't be able to, off the top of my head. That is because I don't know any tweets off the top of my head. In the video's case I would expect the interviewer to pull out his phone and browse Twitter for a few seconds to find an offending tweet. Of course if he fails to find one after a few seconds, that will make him look worse than he already did.