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While doing Problem 7. Here is Problem 7. Intuitively, the first closure property implies that the corresponding complexity class is "computational model-independent", that is, it is robust under reasonable changes in the underlying model of computation from RAM's to Turing machines, to multistring Turing machines, etc. I thought about two interpretations. Which interpretation is the correct one? Thanks in advance.Scientific definition theory Video
What’s the difference between a scientific law and theory? - Matt Anticole scientific definition theoryThis section does not cite any sources. Please help improve this section by adding citations to reliable sources. Unsourced scientific definition theory may be challenged and removed. October Learn how and when to remove this template message Typically for any theory to be accepted within most academia there is one simple criterion. The essential criterion is that the scientific definition theory must be observable and repeatable. The aforementioned criterion is essential to prevent fraud and perpetuate science itself.
The tectonic plates of the world were mapped in the second half of the 20th century. Plate tectonic theory successfully explains numerous observations about the Earth, including the distribution of earthquakes, mountains, continents, and oceans. The defining characteristic of all scientific knowledge, including theories, is the ability to make falsifiable or testable predictions. The relevance and scientific definition theory of scientific definition theory predictions determine how potentially useful the theory is.
A would-be theory that makes no observable predictions is not a scientific theory at all. Predictions not sufficiently specific to be tested are similarly not useful. In both cases, the term "theory" is not applicable. A body of descriptions of knowledge can be called a theory if it fulfills the following criteria: It makes falsifiable predictions with consistent accuracy across a broad area of scientific inquiry such as mechanics. It is well-supported by many independent strands of evidence, https://digitales.com.au/blog/wp-content/custom/negative-impacts-of-socialization-the-positive-effects/korean-war-documentary-bbc.php than a single foundation.
It is consistent with preexisting experimental results and at least as accurate in its predictions as are any preexisting theories. Other criteria[ edit ] In addition, scientists prefer to work with a theory that meets the following qualities: It can be subjected to minor adaptations to account for new data that do not fit it perfectly, as they are discovered, thus increasing its predictive capability over time.
This is because for each accepted explanation of a phenomenon, there may be an extremely large, perhaps even incomprehensible, number of possible and more complex alternatives, because one can always burden failing explanations with ad hoc hypotheses to prevent them from being falsified; therefore, simpler theories are preferable to more complex ones because they are more testable.
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It refers to a comprehensive explanation of some aspect of nature that is supported by a vast body of evidence. Many scientific theories are so well established that no new evidence is likely to alter them substantially. For example, no new evidence will demonstrate that the Earth does not orbit around the sun heliocentric theoryor that living things are not scientific definition theory of cells cell theorythat matter is not composed of atoms, or that the surface of the Earth is not divided into solid plates that have moved over geological timescales the theory of plate tectonics One of the most useful properties of scientific theories is that they can be used to make predictions about natural events or phenomena that have not yet been observed.
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". It is as factual an explanation of the universe as the atomic theory of matter or the germ theory of disease. Our understanding of gravity is still a work in progress. But the scientific definition theory of gravity, like evolution, is an accepted fact. Note that the term theory would not be appropriate for describing untested but intricate hypotheses or even scientific models. The first observation of cellsby Robert Hookeusing an early microscope.
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The scientific method involves the proposal and testing of hypothesesby deriving predictions from the hypotheses about the results of future experiments, then performing those experiments to see scientific definition theory the predictions are valid. This provides evidence either for or against the hypothesis. When enough experimental results have been gathered in a particular area of inquiry, scientists may propose an explanatory framework that accounts for as many of these as possible. This explanation is also tested, and if it fulfills the necessary criteria see abovethen the explanation becomes a theory.
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This can take many years, as it can be difficult or complicated to gather sufficient evidence. Once all of the criteria have been met, it will be widely accepted by scientists see scientific consensus as the best available explanation of at least some phenomena.
It will have made predictions of phenomena that previous theories could not explain or could not predict accurately, and it will have resisted attempts at falsification. The strength of the evidence is evaluated by the scientific scientific definition theory, and the most important experiments will have been replicated by multiple independent groups.]
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