In reality, sometimes it is necessary to use violence to solve a problem. If someone is trying to kill me, that’s a problem. It is perfectly acceptable to meet that violence with violence to stop it and get away. Will that ever happen in a normal workplace, and will it be my go-to move? Almost certainly not, but the “sometimes” does leave the possibility open to that unlikely event.

speak for yourself, earlier today I punched someone for taking too long to answer my question.

/s

For example, people answering questions honestly might answer them slightly differently to people who are lying and trying to get the correct answer.

E.g. To the question "how often do you get angry?", the answer "never" would be (potentially) highly desirable, but probably not honest. Whereas "sometimes" would be honest. So maybe some questions are there only to try and gauge honesty of the answers, so other questions can be interpreted with more confidence.

Maybe the designers of these questionnaires have innocuous-sounding questions that are really a test of whether the candidate is answering honestly, e.g. "Have you ever stayed in your pyjamas all day?" (just a silly example, but hopefully you see what I'm getting at).

You: but *sometimes violence is justified, no?

HR: No.