I'm no longer quite so sure. The possibilities are that consciousness:
1) Is binary or exists in a continuous spectrum
2) Is fundamental property (panpsychism) or emergent
If it is a continuous, fundamental property, then what we experience as qualia (i.e. subjective, conscious experience) are merely a higher order version of any reaction of anything to any other thing (from a glass shattering due to blunt force, to a venus flytrap closing in response to an insect). It also implies that there may be other intelligent species out there with a much higher order of consciousness (not merely intelligence) capable of higher levels of conscious experience. In which case, we have a serious problem with the way we are treating some animals.