RESEARCH BASE
Search 3,721 documents across 34 fields — every claim tier-rated by evidence
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.
2,551 results for "Quan Van Le" — page 104 of 128
P_3_02 — Pre-Socratic Philosophy — The Birth of Western Thought
The Pre-Socratic philosophers (c. 624–370 BCE) inaugurated Western philosophy by replacing mythological explanations of the natural world with rational inquiry into a single unifying principle (archê). From Thales' ident
P_3_11 — Neoplatonism: Plotinus, Proclus, and the One
Neoplatonism is the philosophical and spiritual system founded by Plotinus (c. 204-270 CE) and elaborated by his successors — notably Porphyry (c. 234-305), Iamblichus (c. 245-325), and Proclus (412-485) — which reinterp
P_3_01 — Epistemology — How Do We Know What We Know?
Epistemology — the branch of philosophy concerned with the nature, sources, and limits of knowledge — is arguably the most foundational discipline for any research project that evaluates claims across time, culture, and
P_3_05 — Philosophy of Science — Demarcation, Method, and Progress
The philosophy of science investigates the foundations, methods, and implications of science — asking what distinguishes science from non-science (the demarcation problem), how scientific theories are confirmed or refute
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
P_3_04 — Phenomenology — Consciousness and the Structure of Experience
Phenomenology, founded by Edmund Husserl at the turn of the 20th century, is the systematic study of the structures of consciousness and the phenomena that appear within it. Through its central methodological innovations
P_3_08 — Pragmatism — American Philosophy
Pragmatism is the most distinctive American contribution to philosophy, originating in the 1870s with Charles Sanders Peirce (1839–1914), developed by William James (1842–1910), and extended by John Dewey (1859–1952). It
P_3_16 — Heidegger & Phenomenology
Martin Heidegger (1889–1976) is widely regarded as one of the most influential — and controversial — philosophers of the 20th century. His magnum opus, Sein und Zeit (Being and Time, 1927), transformed Western philosophy
P_3_06 — Plato — Forms, Cosmology, and the Philosophical Tradition
Plato (428/427–348/347 BCE) is the foundational figure of Western philosophy, whose dialogues established the frameworks for metaphysics (Theory of Forms), epistemology (knowledge as recollection), political philosophy (
P_4_12 — Mesoamerican Philosophy
Mesoamerican philosophy refers to the systematic thought traditions of pre-Columbian civilizations — primarily the Nahua (Aztec/Mexica) and Maya — as reconstructed from colonial-era sources (Nahuatl-language texts collec
P_4_03 — Language, Naming, and the Creative Word
Across unrelated civilizations, language — specifically the spoken word — is understood as a creative force, not merely a communication tool. The Egyptian god Ptah creates the world through speech; the Hebrew God speaks
P_4_06 — Buddhist Philosophy — Dependent Origination, Non-Self, and Emptiness
Buddhist philosophy — developed from the teachings attributed to Siddhārtha Gautama (c. 5th century BCE) and elaborated over 2,500 years across diverse Asian cultures — offers one of the most rigorous philosophical analy
P_4_07 — Confucian Ethics, Filial Piety, and Social Harmony
Confucianism — the ethical, social, and political philosophy developed from the teachings of Kong Qiu (Confucius, 551-479 BCE) — has shaped East Asian civilization more profoundly than perhaps any other single intellectu
P_4_01 — Death and the Afterlife Across Cultures
Every known human culture has developed beliefs about what happens after death — making afterlife cosmology one of the most universal features of human thought. The major frameworks include: judgment and reward/punishmen
P_4_13 — Chinese Philosophy — Dao, Confucius, and Beyond
Chinese philosophy encompasses one of the world's richest and longest-continuous intellectual traditions, spanning from the Zhou dynasty (~1046–256 BCE) to the present. The foundational period — the Hundred Schools of Th
P_4_02 — Perennial Philosophy and Universal Wisdom
The Perennial Philosophy — philosophia perennis — is the thesis that beneath the surface diversity of the world's religious and spiritual traditions lies a SINGLE, universal truth about the nature of reality and human ex
P_4_10 — Islamic Philosophy — Al-Kindi to Ibn Rushd and Beyond
Islamic philosophy (falsafa) represents one of the great intellectual traditions in human history, flourishing from the 9th through 12th centuries CE and continuing through later thinkers like Mulla Sadra into the modern
P_4_09 — Non-Dualism — Advaita Vedanta, Taoism, and the Unity of Opposites
Non-dualism — the philosophical position that ultimate reality is not divided into fundamentally opposed categories (subject/object, mind/matter, self/other, good/evil) — appears independently across the world's deepest
P_4_05 — Stoicism — Ancient Resilience Philosophy Applied to Modern Existence
Stoicism — founded by Zeno of Citium circa 300 BCE and developed over five centuries by thinkers ranging from freed slaves to Roman emperors — is one of history's most practically influential philosophical systems. Its c
P_1_09 — Philosophy of Time
The philosophy of time addresses some of the deepest questions in metaphysics: Is time real or an illusion? Does the present moment have a special ontological status, or are past, present, and future equally real? Does t
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