I'm starting with the premise that AI assistance makes people more productive - if you don't see this, you're either misinformed, several years out of date, or

I'm starting with the premise that AI assistance makes people more productive - if you don't see this, you're either misinformed, several years out of date, or we have some deep idelogical disagreements that we aren't going to resolve in this thread. Given that AI tools make you more productive, you can ask the candidate why they refuse to use it, and see if they give a satisfying answer. If someone said that they have stackoverflow blocked and refuse to use it under any circumstances, that would be a bit of a red flag - the refusal to use AI assistance is in a similar category. I would want to hire people who want to get things done in the most efficient way possible - refusing to use tools that make you better at your job is a sign that maybe you aren't that type of person.