A hypothesis (plural hypotheses) is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories. Even though the words "hypothesis" and "theory" are often used synonymously, a scientific hypothesis is not the same as a scientific theory. A scientific hypothesis is a proposed explanation of a phenomenon which still has to be rigorously tested. In contrast, a scientific theory has undergone extensive testing and is generally accepted to be the accurate explanation behind an observation. A working hypothesis is a provisionally accepted hypothesis proposed for further research.
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Some articles on hypothesis:
... The PANDAS diagnosis and the hypothesis that symptoms in this subgroup of patients are caused by infection are controversial ... Researchers are pursuing the hypothesis that the mechanism is similar to that of rheumatic fever, an autoimmune disorder triggered by streptococcal infections, where antibodies attack the brain and cause ... The molecular mimicry hypothesis is a proposed mechanism for PANDAS this hypothesis is that antigens on the cell wall of the streptococcal bacteria are ...
... The hypothesis of directed mutagenesis was first proposed in 1988 by John Cairns, of Harvard University who was studying Escherichia coli that lacked the ability to metabolize ... Later support for this hypothesis came from Susan Rosenberg, then at the University of Alberta, who found that an enzyme involved in DNA recombinational repair, recBCD, was necessary for the ... The directed mutagenesis hypothesis was challenged in 2002, when John Roth and colleagues showed that the phenomenon was due to general hypermutability due to selected gene amplification, and was thus a ...
... interest, and based on previous knowledge, develops a hypothesis ... The scientist then designs a controlled experiment which will allow him to test the hypothesis against the real world ... He then makes predictions about the outcome of the test, based on the hypothesis ...
... The first hypothesis is that the evolution of schreckstoff has been driven by kin selection (Smith 1992) ... Support for this hypothesis would include evidence that individuals live in groups of closely related kin and that the release of chemical alarm signals increases the likelihood that ... The second hypothesis, predator attraction, suggests that the release of schreckstoff may attract additional predators which will interfere with the predation event ...
... The basic premise of the eu-FEDS hypothesis is that both soluble and cell surface associated glycoproteins, present in the reproductive system and ...
More definitions of "hypothesis":
- (noun): A message expressing an opinion based on incomplete evidence.
Synonyms: guess, conjecture, supposition, surmise, surmisal, speculation
Famous quotes containing the word hypothesis:
“On pragmatistic principles, if the hypothesis of God works satisfactorily in the widest sense of the word, it is true.”
—William James (18421910)
“The wheels and springs of man are all set to the hypothesis of the permanence of nature. We are not built like a ship to be tossed, but like a house to stand.”
—Ralph Waldo Emerson (18031882)
“It is more than likely that the brain itself is, in origin and development, only a sort of great clot of genital fluid held in suspense or reserved.... This hypothesis ... would explain the enormous content of the brain as a maker or presenter of images.”
—Ezra Pound (18851972)