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descartes × 241epistemology × 44
philosophy-of-mind × 30
existence × 29
metaphysics × 27
history-of-philosophy × 20
dualism × 17
rationalism × 17
skepticism × 16
ontology × 14
theology × 14
reference-request × 13
logic × 12
mind-body × 12
kant × 9
philosophy-of-mathematics × 7
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philosophy-of-science × 6
consciousness × 5
knowledge × 5
solipsism × 5
truth × 4
reality × 4
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foundationalism × 4