Maybe the candidate just trying to show their passion and they just not completely trusted you, so they're not sure about the answer. Or the candidate may have

Maybe the candidate just trying to show their passion and they just not completely trusted you, so they're not sure about the answer. Or the candidate may have just failed another interview hours ago because he said he enjoyed working 8 or 12 hours a day, and lose the faith of humanity all together. You'll never know why they've generated that answer if you don't ask a follow up question.