In any discussion of the limitations of science we must carefully differentiate two different topical claims.
- 1. The topic of whether the content of the scientific knowledge is limited.
- 2. The topic of whether science is methodologically limited.
The first topic is easy to lay to rest, since it is factually true that the content of scientific knowledge is limited. These limitations are seen in both the incomplete theories and in the plain lack of data on physical objects which humans cannot yet measure. Even physics does not have a complete theory. There may be a set of rules by which life first forms and evolves on planets which support it. There may even be "laws" by which this happens. But science remains silent on those rules and laws from lack of data on extra-terrestrial life.
Transitioning to the second topic. This topic is whether science, as a
methodology adopted by professionals is, in some way, intrinsically limited. This is a completely different claim than the proceeding section. An analogy here would be writing that,
"science has no data on organic life forms outside the solar system" versus the claim,
"Science can never collect data on extraterrestrial life outside the solar system, even theoretically."
An analogy (which is more pertinent to us here at this forum) would be comparing "Science has no data on near-death experiences" versus the claim "Science can never compile evidence about near-death experiences because of an intrinsic methodological shortcoming" or "The scientific method is impotent in having to ever form a theory of NDEs, ever."
In all cases, it would be counter-productive to simply keep listing the lack of data of particular phenomena in nature as a demonstrations of a methodological limitation of science. The usual form of this fallacious argument goes: "Science cannot explain X, and science cannot explain Y, and science cannot explain Z, ergo science is limited (methodologically)." This is patently fallacious, since the
lack of particular data on any given phenomena says nothing about the
limitations of the methodology within the disciplines of science.
Both of these topical arguments (lack of data, versus methodological limits) are plausible topics in philosophy. Each are equally valid and interesting for discussion. In the case of David Chalmers, he points out an actual methodological limitation. That is, it needs to be emphasized that Chalmers's writing on Consciousness is fundamentally different than
"Science cannot explain consciousness right now!" Chalmers literally is taking the position that science lacks the epistemological tools to describe consciousness at all, even theoretically. The, raw empirical sciences of biology, and neuroscience, as they exist, suffer from an epistemological gap when it comes to knowledge of consciousness. The overly-rough synopsis of Chalmers would be to say something similar to, (for example) :
Even if neuroscience had a complete wiring diagram of the human brain down to molecular binding sites on synapses, you still could not infer from that diagram that the person was having internal experiences.
That is, even if neuroscience was taken to methodological completion, the completed neuroscience still cannot reach this conclusion. This limitation of science was received well. Even the most hardened reductionists agree this problem persists. (e.g. Richard Dawkins)
This thread involves the topic of limitations in science; science as both a body of knowledge, and science as a method engaged in by professionals. It is therefore, not a place to make self-fulfilling prophecies, tautologies, word games, seances, or utilize invisible unicorn defense. The
"Invisible Unicorn that I know exists, but you can't measure it because it is invisible" has no place in this thread. If you want to discuss the
"invisible human soul that exists but science can't measure it because science is limited to physical things. But woopsie, the soul is non-physical" please go back and do unicorn-talk in skakos's thread. Not here.