What is the best piece of advice you have ever received? How might your life be different if you had never received this advice?
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What do you think has been the most important invention of the last 50 years? What would have been different if this had never been invented? How would the world be different now?
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Think about an important advancement in your field. What would have happened if this advancement had never happened? What would be different now if this advancement had never happened?
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