Solid

"the screen is impermanent, organic, transient,"

"Reading... is always this: there is a thing that is there,

a thing made of writing, a solid, material object,

which cannot be changed, and through this thing

we measure ourselves against something else that is not present,

something else that belongs to the immaterial, invisible world,

because it can only be thought, imagined,

or because it was once and is no longer, past, lost, unattainable,

in the land of the dead..." (Calvino 72).

while "paper is solid, hard, irreducible" (Swigart 139).

Paper is the interface, for viewing and discarding; but never for storing.