What is coincidence: Definition and 56 Discussions

A coincidence is a remarkable concurrence of events or circumstances that have no apparent causal connection with one another. The perception of remarkable coincidences may lead to supernatural, occult, or paranormal claims, or it may lead to belief in fatalism, which is a doctrine that events will happen in the exact manner of a predetermined plan. In general, the perception of coincidence, for lack of more sophisticated explanations, can serve as a link to folk psychology and philosophy.From a statistical perspective, coincidences are inevitable and often less remarkable than they may appear intuitively. Usually, coincidences are chance events with underestimated probability. An example is the birthday problem, which shows that the probability of two persons having the same birthday already exceeds 50% in a group of only 23 persons.

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  1. wolram

    Can the Large Number Coincidence Be Explained by Simple Scaling Laws?

    http://arxiv.org/ftp/physics/papers/0502/0502049.pdf Title: The Large Number Coincidence, The Cosmic Coincidence and the Critical Acceleration Authors: Scott Funkhouser Comments: This version accepted for publication in Proc. Roy. Soc. A; 5 pages Subj-class: General Physics The coincidence...
  2. Garth

    Astonishing Coincidence: Age of Universe in $\Lambda$CDM & Milne Cosmologies

    Coincidence of Universe age in $\Lambda$CDM and Milne cosmologies I wonder why... Just another example of the degeneracy* perhaps? Garth (*Now accepted for publication in Astrophysics and Space Science)
  3. T

    This is probably just a coincidence, but

    EK = mv^2 energy kinetic = mass times velocity squared So... Isn't one way to interpret time dilation that everything moves through time and space with a sum velocity of c (somehow), and that as velocity in space increases velocity in time therefore decreases? I've read this in several...
  4. X

    Some my puzzles of coincidence counting

    Some my puzzles of “coincidence counting” When I read literatures concerning with two-photon interference experiment, the “two-photon interference patterns” are always got by means of so called” coincidence counting”. My questions are: What is the coincidence counting? What the essential is the...
  5. C

    Coincidence About Vision on Earth

    Our sun eminates electromagnetic radiation over an enormous range of frequencies. Radiation curves (energy@wavelength) resemble bell curves, and highly accurate measurements have shown that the peak of the sun's radiation curve is in the visible light range. This is not a coincidence, it is...
  6. Loren Booda

    Caught in coincidence, myopic to miracles

    I have met people who believe magic of mathematical coincidences magnified by their own predisposition for patterning. A TV commercial will say the word "soap" simultaneously to the viewer (me) thinking it. Perhaps you, at a party, were about to say the word "hippopotamus," but suppressed the...
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