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  2. Law of thought - Wikipedia

    en.wikipedia.org/wiki/Law_of_thought

    First then this at least is obviously true, that the word "be" or "not be" has a definite meaning, so that not everything will be "so and not so". Again, if "man" has one meaning, let this be "two-footed animal"; by having one meaning I understand this:—if "man" means "X", then if A is a man "X" will be what "being a man" means for him.

  3. List of fallacies - Wikipedia

    en.wikipedia.org/wiki/List_of_fallacies

    But one cannot assume that everywhere there is oxygen, there is fire. A condition X is sufficient for Y if X, by itself, is enough to bring about Y. For example, riding the bus is a sufficient mode of transportation to get to work. But there are other modes of transportation – car, taxi, bicycle, walking – that can be used.

  4. Two-level utilitarianism - Wikipedia

    en.wikipedia.org/wiki/Two-level_utilitarianism

    The set of intuitive moral rules that the prole follows must be simple and general enough that they can be easily understood and memorised, and also quick and easy to use. [citation needed] Once one has identified the different types of moral thinking, the next step is to identify when one ought to think like an archangel, and when like a prole.

  5. A Treatise Concerning the Principles of Human Knowledge

    en.wikipedia.org/wiki/A_Treatise_Concerning_the...

    Ideas that are perceived through our senses are lively and distinct, unlike imagined ideas. Their orderly connection and coherence reflects the wisdom and benevolence of the mind that made them. The ideas of sense occur according to rules. We call these connections and associations laws of nature. [29] Necessary connections are not discovered ...

  6. Empiricism - Wikipedia

    en.wikipedia.org/wiki/Empiricism

    There are two sources of our ideas: sensation and reflection. In both cases, a distinction is made between simple and complex ideas. The former are unanalysable, and are broken down into primary and secondary qualities. Primary qualities are essential for the object in question to be what it is.

  7. Murphy's law - Wikipedia

    en.wikipedia.org/wiki/Murphy's_law

    Murphy's law [a] is an adage or epigram that is typically stated as: "Anything that can go wrong will go wrong.".. Though similar statements and concepts have been made over the course of history, the law itself was coined by, and named after, American aerospace engineer Edward A. Murphy Jr.; its exact origins are debated, but it is generally agreed it originated from Murphy and his team ...

  8. Philosophy of logic - Wikipedia

    en.wikipedia.org/wiki/Philosophy_of_logic

    Following definitory rules determines whether one plays chess or something else while following strategic rules determines whether one is a good or a bad chess player. [ 5 ] [ 79 ] Both definitory and strategic rules are to be distinguished from empirical descriptive rules, which generalize how people actually draw inferences, whether correct ...

  9. List of rules of inference - Wikipedia

    en.wikipedia.org/wiki/List_of_rules_of_inference

    A set of rules can be used to infer any valid conclusion if it is complete, while never inferring an invalid conclusion, if it is sound. A sound and complete set of rules need not include every rule in the following list, as many of the rules are redundant, and can be proven with the other rules.