Posted: Feb 16, 2016 8:49 am
by Little Idiot
I think existence should be used to mean 'in the world' (and reality defined differently).
So an apple we can point to exists not because we can point to it, rather it exists by being in the world and it is because it exists that we can point to it.
visible light or invisible Xrays exist by being in the world, although it is not possible to point at, showing that being able to point at something is not a requirement for it to exist.