Preconceived notions are the locks on the door to wisdom.
Of course you can use the products of science to do bad things, but you can use them to do good things, too.
I heard this massive thud. I spun around, and there Keith was, on the ground. He'd cut his gums up on impact, he was very bloody, and clutching his head. I think it was a kind of wake-up call for him.
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