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Incontrovertible evidence and conclusive evidence (less formally, concrete evidence and hard evidence) [1] [2] are colloquial terms for evidence introduced to prove a fact that is supposed to be so conclusive that there can be no other truth to the matter; i.e., evidence so strong it overpowers contrary evidence, directing a fact-finder to a ...
John Locke (1632–1704), the likely originator of the term.. Argument from ignorance (Latin: argumentum ad ignorantiam), or appeal to ignorance, [a] is an informal fallacy where something is claimed to be true or false because of a lack of evidence to the contrary.
Definitional retreat – changing the meaning of a word when an objection is raised. [23] Often paired with moving the goalposts (see below), as when an argument is challenged using a common definition of a term in the argument, and the arguer presents a different definition of the term and thereby demands different evidence to debunk the argument.
An argument is a series of sentences, statements, or propositions some of which are called premises and one is the conclusion. [1] The purpose of an argument is to give reasons for one's conclusion via justification, explanation, and/or persuasion.
Opposition is a semantic relation in which one word has a sense or meaning that negates or, in terms of a scale, is distant from a related word. Some words lack a lexical opposite due to an accidental gap in the language's lexicon. For instance, while the word "devout" has no direct opposite, it is easy to conceptualize a scale of devoutness ...
An antithesis must always contain two ideas within one statement. The ideas may not be structurally opposite, but they serve to be functionally opposite when comparing two ideas for emphasis. [4] According to Aristotle, the use of an antithesis makes the audience better understand the point the speaker is trying to make. Further explained, the ...
Direct negative evidence in language acquisition consists of utterances that indicate whether a construction in a language is ungrammatical. [1] Direct negative evidence differs from indirect negative evidence because it is explicitly presented to a language learner (e.g. a child might be corrected by a parent). Direct negative evidence can be ...
More broadly, proof by contradiction is any form of argument that establishes a statement by arriving at a contradiction, even when the initial assumption is not the negation of the statement to be proved. In this general sense, proof by contradiction is also known as indirect proof, proof by assuming the opposite, [2] and reductio ad ...