You can call it whatever you want, but I think if a candidate would be humiliated by saying "I don't know" in an interview, that's a strong negative signal. Say

You can call it whatever you want, but I think if a candidate would be humiliated by saying "I don't know" in an interview, that's a strong negative signal. Saying "IDK" and reading the docs, googling it, or asking for help is at least half of the job.