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  2. Soundness - Wikipedia

    en.wikipedia.org/wiki/Soundness

    In deductive reasoning, a sound argument is an argument that is valid and all of its premises are true (and as a consequence its conclusion is true as well). An argument is valid if, assuming its premises are true, the conclusion must be true. An example of a sound argument is the following well-known syllogism: (premises) All men are mortal.

  3. Validity (logic) - Wikipedia

    en.wikipedia.org/wiki/Validity_(logic)

    The corresponding conditional of a valid argument is a logical truth and the negation of its corresponding conditional is a contradiction. The conclusion is a necessary consequence of its premises. An argument that is not valid is said to be "invalid". An example of a valid (and sound) argument is given by the following well-known syllogism:

  4. List of valid argument forms - Wikipedia

    en.wikipedia.org/wiki/List_of_valid_argument_forms

    Of the many and varied argument forms that can possibly be constructed, only very few are valid argument forms. In order to evaluate these forms, statements are put into logical form . Logical form replaces any sentences or ideas with letters to remove any bias from content and allow one to evaluate the argument without any bias due to its ...

  5. Logical reasoning - Wikipedia

    en.wikipedia.org/wiki/Logical_reasoning

    For example, inferring the conclusion "no cats are frogs" from the premises "all frogs are amphibians" and "no cats are amphibians" is a sound argument. But even arguments with false premises can be deductively valid, like inferring that "no cats are frogs" from the premises "all frogs are mammals" and "no cats are mammals".

  6. Deductive reasoning - Wikipedia

    en.wikipedia.org/wiki/Deductive_reasoning

    An argument can be “valid” even if one or more of its premises are false. An argument is sound if it is valid and the premises are true. It is possible to have a deductive argument that is logically valid but is not sound. Fallacious arguments often take that form. The following is an example of an argument that is “valid”, but not ...

  7. Modus ponens - Wikipedia

    en.wikipedia.org/wiki/Modus_ponens

    An argument can be valid but nonetheless unsound if one or more premises are false; if an argument is valid and all the premises are true, then the argument is sound. For example, John might be going to work on Wednesday. In this case, the reasoning for John's going to work (because it is Wednesday) is unsound.

  8. 12 of the Best 'I Statements' To Use in Arguments, According ...

    www.aol.com/12-best-statements-arguments...

    Experts share 12 "I statements" to use in arguments at work and in your personal life. ... What Is an I-Statement Example? ... "This statement may sound like an 'I statement,' but it places blame ...

  9. Argument - Wikipedia

    en.wikipedia.org/wiki/Argument

    An argument is sound when the argument is valid and argument's premise(s) is/are true, therefore the conclusion is true. ... The military budget argument example is a ...