Understanding epistemology

If the premises is true the conclusion must also be true.Here the truth of the premises entails the truth of the conclusion.This is known as validity .If  one of the premises is not true but would support the same conclusion the argument is not only valid but sound as well. Valid arguments are known as deductive arguments and they are useful because they enable one to acquire knowledge. By having knowledge of the premises one can thereby infer one’s conclusion and in doing so gain knowledge of a new proposition.Valid arguments which lack true premises can also be epistemically useful in that they can be used to extend justified belief.

Non-deductive reasoning (where the truth of the premises does not entail the truth of the conclusion) is known as induction which means not going directly  from knowledge of the premises to knowledge of the conclusions but rather from premises to a likely conclusion.

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