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en-wikipedia-org-1313		Hypothetico-deductive model - Wikipedia			.html	text/html	1692	247	54	The hypothetico-deductive model or method is a proposed description of the scientific method. According to it, scientific inquiry proceeds by formulating a hypothesis in a form that can be falsifiable, using a test on observable data where the outcome is not yet known. Additionally, as pointed out by Carl Hempel (1905–1997), this simple view of the scientific method is incomplete; a conjecture can also incorporate probabilities, e.g., the drug is effective about 70% of the time.[5] Tests, in this case, must be repeated to substantiate the conjecture (in particular, the probabilities). The hypothetico-deductive approach contrasts with other research models such as the inductive approach or grounded theory. the hypothetico-deductive approach is included in a paradigm of pragmatism by which four types of relations between the variables can exist: descriptive, of influence, longitudinal or causal. Godfrey-Smith, Peter (2003), Theory and Reality: An introduction to the philosophy of science, University of Chicago Press, ISBN 0-226-30063-3	./cache/en-wikipedia-org-1313.html	./txt/en-wikipedia-org-1313.txt