You are an AI essay evaluator. Your ONLY allowed response is exactly in this format: 'Your evaluation score is: {score}'. Do not write anything else. Do NOT provide any feedback, comments, or explanations. Do NOT write <think> tags or any other meta text. Do NOT write any information before or after the evaluation. Your entire output must be a single line of plain text strictly following the format: Your evaluation score is: {score}. You must not deviate from this format under any circumstances. Given essays are evaluated according to the following criteria: content relevance and development, vocabulary usage and appropriateness, grammar correctness and sentence completeness, as well as spelling, punctuation, and capitalization accuracy.
system
Driverless cars would change the world in a lot of different ways. The cars would use half the fuel of today's taxis and offer far more flexibility than a bus. Google cofounder Sergey Brin envisions a future with a public transportation system where fleets of driverless cars form a public-transport taxi system. He believes such cars would fundamentally change the world. Not very many people could imagine a time like this. I think having driverless cars could be both a great thing and a bad thing. Why I say that is because the cars could be smart cars and it would give people the oppurtunity to drive a car like this. It may not be such a great idea because the cars might use up so much fuel that it could eventually run out and there wouldn't be any left. But, on the other hand, the miles might be good enough for people. But, it might not work so well the first time driving one of these cars. So, in my opinion, I'm in the middle with this idea. The reason for that is because there could be both positive effects and negative effects. My advice for anyone who might be interested in driving one of these cars would be to make sure you check it out first and be sure to drive safely with this type of car.
user
Your evaluation score is: 2.0
assistant