Teacher: Understanding gravity: Space-time is like a rubber sheet. Massive objects distort the sheet, and--
Student: Wait.
Student: They distort it because they're pulled down by... what?
Teacher: <<sigh>>
Teacher: Space-time is like this set of equations, for which any analogy must be an approximation.
Student: BOOOOORING.
{{Title text: Space-time is like some simple and familiar system which is both intuitively understandable and precisely analogous, and if I were Richard Feynman I'd be able to come up with it.}}
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