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First Principles

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General Thinking Tools
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“A first principle is a basic, foundational, self-evident proposition or assumption that cannot be deduced from any other proposition or assumption.” (related: dimensionality reduction; orthogonality; “Reasonable minds can disagree” if underlying premises differ.)

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Gabriel Weinberg's Mental Models I Find Repeatedly Useful

A first principle is a basic, foundational, self-evident proposition or assumption that cannot be deduced from any other proposition or assumption.” (related: dimensionality reduction; orthogonality; “Reasonable minds can disagree” if underlying premises differ.)

Source: Gabriel Weinberg's Mental Models I Find Repeatedly Useful