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It's very easy to forget the first step :-)

And the second...

That's actually the tricky bit, because often you're just thinking really hard that you're thinking really hard about the problem.

Or thinking about the wrong attack, and giving up. Or just thinking hard about how to define something... Or... Research is hard.

And the third can be a real strain on the wrist.

Yes, and rewriting is the real pain, actually.