Editing Existential fallacy (section)

==Overview==
An existential fallacy is committed in a medieval [[categorical syllogism]] because it has two universal premises and a particular conclusion with no assumption that at least one member of the class exists, an assumption which is not established by the premises.

In modern logic, the presupposition that a class has members is seen as unacceptable. In 1905, [[Bertrand Russell]] wrote an essay entitled "The Existential Import of Proposition", in which he called this Boolean approach "[[Giuseppe Peano|Peano]]'s interpretation".

The fallacy does not occur in [[enthymeme]]s, where hidden premises required to make the [[syllogism]] valid assume the existence of at least one member of the class.{{citation needed|date=February 2014}}