Facts are empirical observations or verifiable data that can be objectively confirmed. Theories, on the other hand, are comprehensive explanations or models that interpret and organize facts, providing frameworks to understand phenomena.
Key Takeaways
- Fact is a piece of information proven true, while theory explains a set of facts.
- Facts are concrete and objective, while theories are subject to revision based on new evidence.
- Facts provide the basis for theories, which help explain the relationship between different facts.
Fact vs Theory
Facts are observations that are highly supported and proven right. Facts can’t be changed and are based on certain calculations. Theories are constructed through different or repeated observations, hypotheses, and facts. Theories can change over time and continue to be tested.

Comparison Table
Feature | Fact | Theory |
---|---|---|
Definition | A statement that has been confirmed through observation and experimentation, and is universally accepted to be true. | A well-substantiated explanation of some aspect of the natural world, based on evidence and observation that has been repeatedly confirmed through testing. |
Certainty | Highly certain, unlikely to change | Well-established, but can be refined or even replaced with new evidence. |
Basis | Observation and experimentation | Evidence, logical reasoning, and hypothesis testing |
Examples | Water boils at 100°C at sea level. The Earth revolves around the Sun. | Evolution by natural selection, Plate tectonics, The Germ Theory of Disease |
What is a Fact?
A fact is a statement that can be objectively verified to be true based on empirical evidence, observation, or reliable sources. It represents an actual occurrence, event, or phenomenon that can be confirmed by multiple observers or through repeatable experiments.
Characteristics of Facts
- Objectivity: Facts are independent of personal opinions, beliefs, or biases. They exist objectively in the world and can be verified by anyone using appropriate methods or evidence.
- Verifiability: Facts are verifiable through empirical evidence or observation. They can be confirmed by multiple sources or through repeatable experiments, ensuring their reliability and accuracy.
- Consistency: Facts are consistent and do not change based on individual perspectives or interpretations. They represent objective truths about the world that remain stable regardless of subjective viewpoints.
Examples of Facts
- The Earth revolves around the Sun.
- Water boils at 100 degrees Celsius at sea level.
- The chemical formula of water is H2O.
Importance of Facts
- Facts serve as the foundation for knowledge and understanding in various fields, including science, history, and mathematics.
- They provide a basis for making informed decisions, solving problems, and advancing human understanding of the world.
- Facts help to distinguish between objective reality and subjective opinions, fostering critical thinking and rational discourse.

What is Theory?
A theory is a well-substantiated explanation or framework that organizes and interprets a set of facts or phenomena within a particular field of study. It goes beyond mere observation by proposing underlying principles, relationships, or mechanisms to explain observed patterns or behaviors. Theories are essential tools in scientific inquiry, providing coherent and testable explanations for natural or social phenomena.
Characteristics of Theories
- Explanatory Power: Theories aim to explain why certain phenomena occur by identifying underlying principles, mechanisms, or causal relationships. They provide a comprehensive framework for understanding observed facts and patterns.
- Predictive Capacity: A robust theory can make predictions about future observations or outcomes based on its underlying principles. These predictions can be tested through experimentation or observation, providing empirical validation or refinement of the theory.
- Falsifiability: Scientific theories are subject to empirical testing and can be potentially falsified through evidence that contradicts their predictions or underlying principles. This distinguishes scientific theories from mere speculation or unfalsifiable beliefs.
Examples of Theories
- Theory of Evolution: This theory, proposed by Charles Darwin, explains the diversity of life on Earth through the mechanisms of natural selection, genetic variation, and adaptation.
- Theory of General Relativity: Albert Einstein’s theory of general relativity provides a framework for understanding the gravitational interactions between massive objects, predicting phenomena such as gravitational time dilation and the bending of light.
- Cell Theory: The cell theory, formulated by biologists Schleiden, Schwann, and Virchow, states that all living organisms are composed of cells, and cells are the basic units of structure and function in living organisms.
Importance of Theories
- Theories play a crucial role in advancing scientific knowledge by providing overarching explanations and guiding further research.
- They help scientists make sense of complex phenomena, identify patterns, and formulate testable hypotheses.
- Theories facilitate communication and collaboration within scientific communities, serving as a common framework for understanding and building upon existing knowledge.

Main Differences Between Fact and Theory
- Nature:
- Facts are empirical observations or verifiable data.
- Theories are comprehensive explanations or models that interpret and organize facts.
- Verification:
- Facts can be objectively confirmed through observation or empirical evidence.
- Theories are validated through their explanatory power, predictive capacity, and empirical testing.
- Stability:
- Facts are concrete and stable, representing objective truths about the world.
- Theories are conceptual constructs that may evolve or be refined based on new evidence or insights.

References
- https://books.google.com/books?hl=en&lr=&id=hFn1Zx_desIC&oi=fnd&pg=PP13&dq=fact+and+theory+difference+in+science&ots=MGTxINYQ8N&sig=nv9vqVU5ucWiOjGDtZTu31mVNXI
- https://books.google.com/books?hl=en&lr=&id=Cf7ProAtFBkC&oi=fnd&pg=PP11&dq=fact+and+theory+difference+in+science&ots=V7Wwf-wuiF&sig=DJQIR-Bm4nFCaF1CnDqUAAElJ54