Labor-saving devices are inventions that reduce the time and effort needed to perform or complete a task. Farm equipment, home appliances and construction equipment are examples of mechanical inventions that save time and physical labor.
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Insanity is when someone does something over and over while expecting a different outcome to occur. So the person continues to do the same action even though there will not be a different outcome from what is already happening. And most of the time, people who are insane don't think they are insane and don't know anything different. They are trapped in there own conciseness.
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