The actual interview was more akin to the interviewer telling an interviewee that "python doesn't support multithreading"; something patently false. No, this kind of erroneous statement should not be glossed over.

For your information, this was the later stage of questions. The very first question did involve a simple summation group by, so I'd already demonstrated my understanding there. I showed no frustration or annoyance during the interview in case you are attempting to imply that was the case.