Ideas from 'Improvement of Understanding' by Baruch de Spinoza [1675], by Theme Structure

[found in 'Ethics, Improvement of Understanding, Letters' by Spinoza,Benedict de (ed/tr Elwes,R.H.M.) [Dover 1955,0-486-20250-x]].

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2. Reason / D. Definition / 2. Aims of Definition
All the intrinsic properties of a thing should be deducible from its definition
14. Science / D. Explanation / 2. Types of Explanation / j. Explanations by essence
To understand the properties we must know the essence, as with a circle