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  2. Scientific theory - Wikipedia

    en.wikipedia.org/wiki/Scientific_theory

    A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world. The theory of biological evolution is more than "just a theory".

  3. Scientific law - Wikipedia

    en.wikipedia.org/wiki/Scientific_law

    Scientific laws or laws of science are statements, based on repeated experiments or observations, that describe or predict a range of natural phenomena. [1] The term law has diverse usage in many cases (approximate, accurate, broad, or narrow) across all fields of natural science (physics, chemistry, astronomy, geoscience, biology).

  4. Hypothesis - Wikipedia

    en.wikipedia.org/wiki/Hypothesis

    The hypothesis of Andreas Cellarius, showing the planetary motions in eccentric and epicyclical orbits. A hypothesis (pl.: hypotheses) is a proposed explanation for a phenomenon. A scientific hypothesis must be based on observations and make a testable and reproducible prediction about reality, in a process beginning with an educated guess or ...

  5. Theory - Wikipedia

    en.wikipedia.org/wiki/Theory

    A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world. The theory of biological evolution is more than "just a theory."

  6. Testability - Wikipedia

    en.wikipedia.org/wiki/Testability

    In short, a hypothesis is testable if there is a possibility of deciding whether it is true or false based on experimentation by anyone. This allows anyone to decide whether a theory can be supported or refuted by data. However, the interpretation of experimental data may be also inconclusive or uncertain.

  7. Theory of relativity - Wikipedia

    en.wikipedia.org/wiki/Theory_of_relativity

    General relativity explains the law of gravitation and its relation to the forces of nature. [2] It applies to the cosmological and astrophysical realm, including astronomy. [3] The theory transformed theoretical physics and astronomy during the 20th century, superseding a 200-year-old theory of mechanics created primarily by Isaac Newton.

  8. Falsifiability - Wikipedia

    en.wikipedia.org/wiki/Falsifiability

    [B] A theory or hypothesis is falsifiable if it can be logically contradicted by an empirical test. Popper emphasized the asymmetry created by the relation of a universal law with basic observation statements [C] and contrasted falsifiability to the intuitively similar concept of verifiability that was then current in logical positivism.

  9. Duhem–Quine thesis - Wikipedia

    en.wikipedia.org/wiki/Duhem–Quine_thesis

    The Duhem–Quine thesis argues that no scientific hypothesis is by itself capable of making predictions. [2] Instead, deriving predictions from the hypothesis typically requires background assumptions that several other hypotheses are correct — that an experiment works as predicted, or that previous scientific theory is accurate.