Hmm. Is a TV crime drama a useful analogy? These are written and directed to highlight certain things about the suspects and manipulate an audience - false leads, clues and behaviours specifically filmed and constructed to take you in a direction. This is not like ordinary evidence, in is contrived to elicit a response. Maybe true crime would be a better analogy? Or maybe crime is not useful at all. Perhaps what you are saying can be made more simple - what are the key indicators of consciousness? How do we determine if something has consciousness? — Tom Storm
Well yes, I did wonder if my framing was not helpful. I gave it because I was specifically asked for "evidence". So I drew the first analogy that came to mind. Evidence appears in other contexts, but crime is the most obvious one. I shouldn't have framed it in terms of fiction, I should have stuck to real life to avoid your criticism about contrivance. True crime would be better, and that's really what I meant.
Broadly I guess it's a reframing of the problem of other minds, and possibly the problem of one's own mind as well.
I was going to write a different OP titled something like "Is there any theory-neutral evidence for consciousness?" but I thought that would narrow the discussion too much. But perhaps it would have been better. With murder, we have a fairly clear concept of what a murder is. That concept then determines what we admit as evidence. So, a bloody dagger found in a bush near a dead body may very well be the kind of thing that would be evidence of a murder. But an observation of a wobble of a star wouldn't be evidence of murder at all. However the observation of the wobble of a star might well be evidence of a planetary orbit, and the dagger is totally irrelevant. So what we admit as evidence is determined by a whole load of definition and theory. In the case of murder, a statutory definition (or common law depending on jurisdiction). For the wobbly star, there's a whole load of background theory that makes the wobble relevant. For example, we need a concept of gravity, and circular orbits, and mass, and the sky as having depth and not like a 2D firmament, etc etc.
But with consciousness, what do we use to determine what to admit as evidence? Do we look in dictionaries for definitions? Well, I think we should. That will help. But people typically don't do that, and that's really weird. They think definitions are up for grabs. They're not really, not unless we want to invent a technical term. And some definitions, like the Glasgow Coma Scale (thanks to
@Banno) make the job really easy. It tells us exactly what to look for. But of course that doesn't capture the sense of 'consciousness' implicated in debates about subjective phenomenal experience. There are dictionary definitions of phenomenal consciousness, e.g.:
"the fact of awareness by the mind of itself and the world"
...there's lots of variations on the theme. And they tend to heavily employ synonyms, which is interestingly uninformative. Such definitions don't really help much when trying to decide what to admit as evidence. So with phenomenal consciousness, do we need to move beyond definition to theory to know what to admit as evidence? I rather think we do. Taking panpsychism for example, my view is that matter does what it does because of how it feels. Regardless of the truth of that, it does provide a criterion for determining what to admit as evidence. Is that stone conscious? Well, is it doing something? Yes, it's energy-matter behaving in a rockish-way. That action is evidence of its consciousness, but
only if we assume panpsychism first! But that's no good is it? When
@apokrisis and
@180 Proof ask me for evidence, what they want is evidence that doesn't pre-suppose panpsychism! They want a reason to believe it that doesn't pre-suppose it. Similarly, if we look for the presence of brains as evidence of consciousness, that assumes a theory, namely that consciousness has something critical to do with brains. So that led me to try to think of evidence that doesn't pre-suppose any theory at all. And the only single piece of evidence that did not imply a whole load of argument and theory, was the fact that I am conscious. I know I am, regardless of any theoretical commitments (and I know some will question even that).
So, with regard to a rock and another human being, is there any
theory neutral evidence to be had?
@fdrake
@Michael