Natural Light
“Natural light” is Descartes’s term for the rational ability to understand the highest kind of truth. When we encounter an argument that simply has to be true—like that a triangle has three sides—we perceive…
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Formal Reality
Formal reality, which contrasts with objective reality, describes something being real in the sense that it actually exists. For instance, saying that a book of philosophy has formal reality means that it is…
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Objective Reality
Objective reality, which contrasts with formal reality, describes something that accurately represents reality. For instance, saying that a book of philosophy has objective reality means that its arguments about the nature of the world…
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