I often meet students that tell me that they “proved” that this parachute was the best, or they “proved” that this ball bounced higher, or they “proved” that bleach kills plants. As soon as I hear the word, I shudder, because scientists, in general, don’t like the word prove. The whole concept of “proving” anything in science makes scientists very uncomfortable because it is not the same as proving something in a court of law.
Scientists generate evidence to support or refute an idea.
So when you are practicing for your interview avoid the word prove at all costs!