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  2. Nebular hypothesis - Wikipedia

    en.wikipedia.org/wiki/Nebular_hypothesis

    The nebular hypothesis is the most widely accepted model in the field of cosmogony to explain the formation and evolution of the Solar System (as well as other planetary systems). It suggests the Solar System is formed from gas and dust orbiting the Sun which clumped up together to form the planets. The theory was developed by Immanuel Kant and ...

  3. Great Filter - Wikipedia

    en.wikipedia.org/wiki/Great_Filter

    Great Filter. The Great Filter is the idea that, in the development of life from the earliest stages of abiogenesis to reaching the highest levels of development on the Kardashev scale, there is a barrier to development that makes detectable extraterrestrial life exceedingly rare. [1][2] The Great Filter is one possible resolution of the Fermi ...

  4. Analysis of competing hypotheses - Wikipedia

    en.wikipedia.org/wiki/Analysis_of_competing...

    v. t. e. The analysis of competing hypotheses (ACH) is a methodology for evaluating multiple competing hypotheses for observed data. It was developed by Richards (Dick) J. Heuer, Jr., a 45-year veteran of the Central Intelligence Agency, in the 1970s for use by the Agency. [1] ACH is used by analysts in various fields who make judgments that ...

  5. Hypothesis - Wikipedia

    en.wikipedia.org/wiki/Hypothesis

    In its ancient usage, hypothesis referred to a summary of the plot of a classical drama. The English word hypothesis comes from the ancient Greek word ὑπόθεσις hypothesis whose literal or etymological sense is "putting or placing under" and hence in extended use has many other meanings including "supposition". [1][3][4][5] In Plato 's ...

  6. Davis–Moore hypothesis - Wikipedia

    en.wikipedia.org/wiki/Davis–Moore_hypothesis

    Davis–Moore hypothesis. The Davis–Moore hypothesis, sometimes referred to as the Davis–Moore theory, is a central claim within the structural functionalist paradigm of sociological theory, and was advanced by Kingsley Davis and Wilbert E. Moore in a paper published in 1945. [1] The hypothesis is an attempt to explain social stratification.

  7. Pythagorean theorem - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_theorem

    In mathematics, the Pythagorean theorem or Pythagoras' theorem is a fundamental relation in Euclidean geometry between the three sides of a right triangle. It states that the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares on the other two sides.

  8. Student's t-test - Wikipedia

    en.wikipedia.org/wiki/Student's_t-test

    Student's t-test is a statistical test used to test whether the difference between the response of two groups is statistically significant or not. It is any statistical hypothesis test in which the test statistic follows a Student's t -distribution under the null hypothesis. It is most commonly applied when the test statistic would follow a ...

  9. Simulation hypothesis - Wikipedia

    en.wikipedia.org/wiki/Simulation_hypothesis

    The simulation hypothesis proposes that what sentient beings experience as the world is actually a simulated reality, such as a computer simulation in which sentient beings themselves are constructs. [1][2] There has been much debate over this topic, ranging from philosophical discourse to practical applications in computing.