👉 In philosophy, the concept of supposititiousness refers to the idea that a statement or argument is false because it does not follow from the premises on which it is based. In other words, if someone argues that "all birds are animals," but then proceeds to say that all fish are mammals, they have implicitly assumed that the premise (the existence of fish) is true, even though the conclusion (the existence of all birds as animals) is false. This type of argumentation is known
