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  2. 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 ...

  3. Alvin Plantinga's free-will defense - Wikipedia

    en.wikipedia.org/wiki/Alvin_Plantinga's_free-will...

    The logical argument from evil argued by J. L. Mackie, and to which the free-will defense responds, is an argument against the existence of God based on the idea that a logical contradiction exists between four theological tenets often attributes to God. Specifically, the argument from evil asserts that the following set of propositions are, by ...

  4. Problem of evil - Wikipedia

    en.wikipedia.org/wiki/Problem_of_evil

    Paul Elmer More says that, to Plato, evil resulted from the human failure to pay sufficient attention to finding and doing good: evil is an absence of good where good should be. More says Plato directed his entire educational program against the "innate indolence of the will" and the neglect of a search for ethical motives "which are the true ...

  5. Good and evil - Wikipedia

    en.wikipedia.org/wiki/Good_and_evil

    Meta-ethics is the study of the fundamental questions concerning the nature and origins of the good and the evil, including inquiry into the nature of good and evil, as well as the meaning of evaluative language. In this respect, meta-ethics is not necessarily tied to investigations into how others see the good, or of asserting what is good.

  6. Logical reasoning - Wikipedia

    en.wikipedia.org/wiki/Logical_reasoning

    Logical reasoning is a form of thinking that is concerned with arriving at a conclusion in a rigorous way. [1] This happens in the form of inferences by transforming the information present in a set of premises to reach a conclusion.

  7. Deductive reasoning - Wikipedia

    en.wikipedia.org/wiki/Deductive_reasoning

    Deductive arguments are evaluated in terms of their validity and soundness. An argument is valid if it is impossible for its premises to be true while its conclusion is false. In other words, the conclusion must be true if the premises are true. An argument can be “valid” even if one or more of its premises are false.

  8. 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:

  9. Epicurean paradox - Wikipedia

    en.wikipedia.org/wiki/Epicurean_paradox

    Carneades could be the true author of the paradox attributed to Epicurus.. There is no text by Epicurus that confirms his authorship of the argument. [3] Therefore, although it was popular with the skeptical school of Greek philosophy, it is possible that Epicurus' paradox was wrongly attributed to him by Lactantius who, from his Christian perspective, while attacking the problem proposed by ...