Comment by kazinator

The main problem is that consciousness is not well-defined, and not in a way that is testable.

Even without that, we are probably safe in saying that much of life is not conscious, like bacteria.

Even humans in deep sleep or under anesthesia might not be conscious (i.e. subjectively report not being able to report experiences to account for the time, and reporting a severely distorted sense of the elapsed interval).

It appears that life is not a sufficient condition for consciousness, so aren't we getting ahead of ourselves if we insist it is a necessary condition?