Two layers, not one. Here are eight things a writer did while redrafting a speech. For each: is it a surface fix or a deep one — and does it actually make the piece stronger? Both layers matter, but deep is where the real lifting happens.
Surface Spelling, a comma, swapping one word for a slightly nicer one. Easy, visible — but small.
Deep The argument, the order, the structure, whether it actually says what you mean.
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Rule of thumb: fix the deep stuff first, polish the surface last. Never the other way round.