Before revision: Despite their ontological non-existence, these entities may nonetheless be said to "exist" as useful descriptions of the various experiences and thoughts that constitute 'this' mind .
After revision: Ontological solipsism differs from Epistemological Solipsism in that, Ontological Solipsism, and therefore one adhering to it as a position, states that nothing exists externally to this one mind, while Epistemological Solipsism, states that nothing can be known for certain to exist externally to this one mindDespite their ontological non-existence, these entities may nonetheless be said to "exist" as useful descriptions of the various experiences and thoughts that constitute 'this' mind .