However, not everyone agrees that a homunculus is necessary for seeing images. Artificial intelligence is often cited as an example of how the homunculus is not necessary. The problem with the homunculus is that it never comes up with computation. It just happens. Jill is shorter than Mary.
Behaviourists believe that processing the problem in the head is no good.
They do not believe in the homunculus. Proposionalists believe that it is acceptible to work out the problem in one's head, but also that we should get rid of the homunculus.