masked man fallacy

premise one

i believe a masked man robbed the bank

premise two

i believe my father did not rob the bankc

conclusion one

so it is conceivable that my father and the masked man are not the same

conclusion two

but if im wrong and my father is the masked man then it is metaphysically impossible that my father and the masked man are not the same

development

whether it is metaphysically possible that my father is the masked man or not depends on what is actually true of the my father

no one can be a different person from the person they are