Is knowledge simply justified true belief?
The traditional analysis of knowledge defines it as justified true belief (JTB). Edmund Gettier published counterexamples in 1963 that many found decisive. What are they, and what do they show?
Open
Omniscientia
Human-authored knowledge base. Peer-reviewed by the community.
Human-authored
Every answer is written by a real person and peer-reviewed by our community. AI is never used to generate answers on Omniscientia — only to help check whether questions are factual before submission.
57
Questions
9
Verified answers
Browse by topic
Astronomy
Stars, planets, galaxies and cosmology
Biology
Life sciences, cells, genetics, ecology and evolution
Chemistry
Elements, compounds, reactions and molecular structure
Computer Science
Algorithms, computation and information theory
Earth Sciences
Geology, meteorology, oceanography and climate
Economics
Economic theory, models, definitions, and empirical findings
Geography
Physical and human geography, countries, landforms, and climate regions
History
Historical events, periods, people, causes, and consequences
Law
Legal definitions, landmark cases, statutes, and procedural facts
Linguistics
Grammar, syntax, etymology, language structure, and the history of languages
Mathematics
Pure and applied mathematics and statistics
Medicine
Anatomy, physiology, pharmacology, clinical facts, and medical history
Neuroscience
The brain, nervous system and cognition
Other
Questions that do not fit an existing topic — topic suggestions are noted in the question.
Philosophy
Logic, formal arguments, the history of ideas, and philosophical concepts
Physics
Matter, energy, motion, forces and the universe
Recent questions
View all →What does "innocent until proven guilty" mean in practice?
The presumption of innocence is considered a cornerstone of criminal justice. What does it actually require of courts and prosecutors, and is it universally applied?
Open
What is the fundamental difference between a virus and a bacterium?
Antibiotics treat bacterial infections but not viral ones. What biological differences between viruses and bacteria explain this, and how do antiviral drugs work instead?
Open
How many languages are there in the world, and how are they counted?
Estimates range from 6,000 to 8,000 languages. What makes counting difficult, and what do we know about how they are distributed geographically?
Open
What is the difference between GDP and GNP?
Both GDP (Gross Domestic Product) and GNP (Gross National Product) measure a country's economic output. What exactly is the difference, and when does it matter which one you use?
Open