Ma`rifat Falsafi

The philosophers’ claims in the discussion on mental existence are as follows: (a) Negation of the superfluity of knowledge of outside world; and (b) substantial correspondence regarding the substances. They have argued that they are capable of proving the first claim, although it is axiomatic and needless of any proof; this is because the existence of mental concepts is a conscientious matter. Those arguments, however, are not able to prove the second claim, unless some other premises and introductions are added and referring the discussion on “correspondence of knowledge” to the dependence of theories on axioms, which is the proper place for discussion on correspondence. What are axiomatic and true in the discussion on mental existence are as follows: There are conceptions in the mind that refer to the external world; These conceptions correspond to their essential references. Finally, the aforementioned arguments cannot prove that external substances themselves come to mind exactly or the corresponding concepts come to mind.