Socrates On Philosophy and Death

[Neo-Scholastic]

In aspect dualism the "quiddity" of a thing would be equally dependent on both material and formal cause. One could not survive without the other and remain the same substance.

Sort of puts the kibosh on transubstantiation, dunnit?

Boru

Just the opposite. That would be the essence of it. The whatness of a thing changes when any of the four causes change. When it is blessed, the final cause of the bread and wine have changed and that makes them different substances.