flawed ideas
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I don't think turbofans need to replace gears with electric motors.
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Directional antennas normally use dishes.
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Tesla decided to use large aluminum castings for the frame of many of its vehicles.
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About a year ago, there was a lot of public interest in a supposed room-temperature superconductor. Why?
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microwave drilling is impractical
Normal drills work better.
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Would it work, technically? Sure. It's just not a good idea.
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Conventional game theory has an important flaw.
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For years now, popular science magazines have occasionally been writing articles about how metamaterials will lead to invisibility cloaks. But they won't.
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As any world-class material scientist could have told you, nanotubes are not actually very good for making strong materials with.