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Charles Sanders Peirce (1839–1914) was a logician and practicing scientist<ref>[[wpit:Charles_Sanders_Peircehttps://it.wikipedia.org/wiki/Charles_Sanders_Peirce|Charles Sanders Peirce]]</ref>; he gradually developed a triadic account of the logic of inquiry. He also distinguishes between three forms of argumentation, types of inference and research methods that are involved in scientific inquiry, namely:

Charles Sanders Peirce (1839-1914) était un logicien et un scientifique praticien<ref>[[wpit:Charles_Sanders_Peircehttps://it.wikipedia.org/wiki/Charles_Sanders_Peirce|Charles Sanders Peirce]]</ref>; he gradually developed a triadic account of the logic of inquiry. He also distinguishes between three forms of argumentation, types of inference and research methods that are involved in scientific inquiry, namely:

#Abduction or the generation of hypotheses

#Abduction or the generation of hypotheses