1. ineffable; that is, they cannot be communicated, or apprehended by
any other means than direct experience.
2. intrinsic; that is, they are non-relational properties, which do not
change depending on the experience's relation to other things.
3. private; that is, all interpersonal comparisons of qualia are
4. directly or immediately apprehensible in consciousness; that is, to experience a quale is to
experiences a quale,
and to know all there is to know about that quale.