Assertion: glider | /r/HasProperty | the paper aeroplane
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text: As I understand it the most numerous glider is the paper aeroplane, and while it is common for people to think of sailplane style gliders if you throw glider at them, they'll readily admit that it has a much wider meaning, and they'll look at you like an idiot if you ask them whether a hang glider is a glider, and I forget where I saw it, but hang gliders are supposedly more numerous than sailplanes.