RESEARCH BASE

Search 3,721 documents across 34 fields — every claim tier-rated by evidence

3,721 Documents 34 Sections 43,625 Citations 34,852 Keywords Indexed 4 Evidence Tiers

3,633 are the core, quality-scored corpus (34 lettered sections — see How We Work); the remaining 88 are cross-corpus synthesis documents (68 InterDocs, 12 Connections, 8 Theories) also indexed here.

7 results for "Descartes"

K_1_11 Verified Consciousness

K_1_11 — Dualism: Mind-Body Problem Across Philosophy and Neuroscience

The mind-body problem — the question of how subjective mental experience (consciousness, thought, sensation, emotion) relates to the physical body (brain, nervous system, matter) — is arguably the oldest and most persist

dualism mind-body problem substance dualism property dualism Descartes Chalmers
Y_5_03 Verified Altered States

Y_5_03 — Pineal Gland / Third Eye Across Cultures

The pineal gland sits at the geometric center of the brain and has been called "the third eye" across cultures for millennia. Ancient pine cone motifs appear at the Vatican (Cortile della Pigna), Assyrian reliefs (winged

pineal gland third eye pine cone ajna chakra Eye of Horus DMT
P_3_10 Verified Philosophy & Meaning

P_3_10 — Skepticism and Pyrrhonism

Skepticism — the philosophical position that knowledge is uncertain, limited, or impossible — is one of the oldest and most persistent currents in philosophy. Ancient Pyrrhonian skepticism (Pyrrho, ~360–270 BCE; Sextus E

skepticism Pyrrhonism Pyrrho Sextus Empiricus Academic skepticism Arcesilaus
P_1_20 Credible Philosophy & Meaning

P_1_20 — Epistemology & Theory of Knowledge

Epistemology — the branch of philosophy concerned with the nature, sources, structure, and limits of knowledge — is one of the oldest and most persistent areas of philosophical inquiry. The central question "What can we

epistemology justified true belief Gettier problem empiricism rationalism foundationalism
P_1_08 Verified Philosophy & Meaning

P_1_08 — Philosophy of Mind and the Body Problem

The mind-body problem — how do mental states (thoughts, feelings, consciousness) relate to physical states (neurons, brains, bodies)? — is one of the oldest and most intractable problems in philosophy. Descartes (1641) f

philosophy of mind mind-body problem dualism Descartes physicalism materialism
V_2_22 Verified Mathematics & Information

V_2_22 — Imaginary Numbers: From "Truly Imaginary" to Physically Necessary

In 1545, the Italian mathematician Girolamo Cardano encountered expressions involving the square root of a negative number while solving cubic equations in his Ars Magna. He used the expression — computed with it, obtain

imaginary numbers complex numbers √-1 i Cardano Bombelli
V_2_03 Verified Mathematics & Information

V_2_03 — History of Algebra: Al-Khwarizmi to Group Theory

Algebra — the generalization of arithmetic to unknown quantities and their relationships — has a 4,000-year documented history, from Babylonian equation-solving tablets (c. 1800 BCE) through Brahmagupta's Indian treatise

algebra Al-Khwarizmi equation quadratic cubic Brahmagupta