In general, we may regard a perceptual experience as an
informational state of the subject: it has a certain
content -- the world is represented a certain way
-- and hence it permits of a non-derivative classification as
true or false. For an internal state to be so
regarded, it must have appropriate connections with behaviour
-- it must have a certain motive force upon the actions of
the subject.... The informational states which a subject acquires
through perception are non-conceptual, or
nonconceptualised. Judgements based upon such
states necessarily involve conceptualisation.