Why Regeneron? - "a stable company working on pharmaceuticals" Are you prepared for a job or a career? - "that should be evident from the resume, and it was your job to read it" What unique lab skills will you bring to the department?" - "I do not know ppl's skills in the department, so how I know mine are unique? you can tell and I cannot"
Only after the employee has been advised verbally of the issue, written and documented of the corrections necessary with appropriate time to correct, and when it is absolutely the only remaining option.
It's all about starting with vague questions: What's not being accomplished, What's the bottle neck, etc.; before moving on to specifics. Ask the same question to as many people as possible to get the best answer.