Powerful tools for thought usually arise as a byproduct of real work in a field rather than "I have an idea for a tool!" (Hindu-Arabic numerals, microscopes, RenderMan, Mathematica). => People interested in tools must get into a context s.t. real work incites tool-work. Not easy!
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What are some practices that help discover these ideas for tools? Just work and jot down the ideas as they come?
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This essay tries to answer that question, though of course there are many more interesting practices worth discussing (and discovering):

