In definitions of evolution that avoid this circularity, it seems languages and computer viruses, even crystals, may be living things (as well as biological viruses). — Count Timothy von Icarus
For my money, definitions like Pattee’s epistemic cut, Salthe's infodynamics, Rosen’s metabolism-repair systems, Friston's Bayesian mechanics, all put their finger on the critical biosemiotic issue. Life and mind are all about rate independent information in control of rate dependent dynamics.
So nature has plenty of examples of physico-chemical dissipative structure - energy being turned to entropy and creating informational structure so as to stabilise that flow in a "far from equilibrium" fashion.
A tornado exists as the vortex structure that it is because it dissipates a heat gradient. And a tornado even seems half alive as it runs around a plain "eating" where there is the most gradient to eat.
But actual life adds the modelling relation by being able to encode information and form first person memories of the past that inform its first person expectations about the future.
Computers fail the "living organism" test as they don't use information to construct their own metabolisms or manage their own physical environments. They are not plugged into their own "world" or umwelt, in cybernetic, self-interested, fashion. Some human comes along to plug them into a wall socket and away they go - crunching memories that aren't their own to produce expectations that aren't for them.
Plenty of complex phenomena, seeming miracles of life, actually end up being described by the same mathematics that can describe phenomena in diffuse inorganic systems (earthquakes and heart cells sharing the same model for synchrony). — Count Timothy von Icarus
That is why I would treat dissipative structure as the new core model of physics. It would be the pansemiotic theory of existence. A metaphysics based on natural thermodynamic structure rather than an atomistic materialism.
And of course, that is where physics is going. Particles and vacuums become quantum topological order in quantum condensates. The universe is a Big Bang spreading~cooling its way to its holographic Heat Death - a hot excitation falling into its own heat sink. Whether you are talking strings, loops or preons, the motivating idea is that of irreducible topological order from which you get the macro-emergence of an entropic spacetime filled with a randomness of thermalising particle events.
So all of physics and chemistry can be cashed out as the structuralism of "far from equilibrium" statistical mechanics. As with a tornado, half the job of being alive and mindful is done. Then life and mind become a simple, mechanical, addition to the organic flows - semiotic codes colonising the great entropy gradients like the original "earth battery" of plate tectonics that drove the sea vent origins of life, and the daily solar flux that eventually put life on a much more generic photosynthetic footing.
So pansemiosis = dissipative structure theory. And biosemiosis is dissipative structure brought under informational regulation in organismic fashion.
Quite a number of biological scientists have been describing the same elephant using their own jargon for the past 40 years. Harold Morowitz had already said it by the 1960s.
The efficient causes are actually where I might put information and meaning. — Count Timothy von Icarus
Yep. Those are the levers that you would want to know about so you can pull them. Rosen's
modelling relation says this.
In Rosen’s (1991) account, a material system is an organism if and only if it is closed to efficient cause. A system is closed to efficient cause if its components have efficient causes generated within the system, and effects that contribute to the production of other efficient causes....
...When explaining the (M, R)-systems, Rosen (1991) points out that it is closure to efficient cause that solves the problems of metabolism, repair and replication of the system. In an organism, the final cause of a component is its contribution to the self-maintenance of the (metabolism, self-repair and organizational invariance of the) system.
So, if you kick semiotics down to the efficient cause, what would be the formal cause? — Count Timothy von Icarus
The model needs to be cashed out as a set of efficient causes. The organism needs to break down its intentions into the simplest and most economical actions that will produce the outcome state it desires. It has to reduce its world to an arrangement of buttons and switches as far as it is concerned.
For example, if the finality is the desire to turn some metabolic cycle on or off, then the smart form of things is to have a chemistry that is all set and ready to go, as a self-organising dissipative gradient, but then add a tiny regulating switch in the shape of an enzyme that can be synthesised at any time and inserted into the mix at the critical point, so releasing the material cause to do its self-organising thing.
That is why reductionism is so wonderfully effective as pragmatic science. It is all about modelling reality as an entropic gradient that has its various easy tipping points, and so the job is to get in there and design the little mechanical devices that can do the tipping on a human command. Scientific theories are models closed for efficient causality, just as Rosen describes.
But that doesn't mean an organism is only a matter of material and efficient cause. Every organism is informed in globally coherent fashion by its past experience. Its world model, as a whole, has Darwinian-filtered structure that embodies an intentional and functional point of view.
I am very intrigued by the fact that incredibly disparate self organizing phenomena operate through extremely similar functions, and how incredibly common self similarity is. — Count Timothy von Icarus
Self-similarity is a generic feature of nature because being an open system is more generic than being a closed one. Stephen Franks did
a good paper on the statistical patterns of nature.
So a log/log or powerlaw statistical pattern is simpler than a normal/normal or Gaussian bell curve distribution because the powerlaw relation is "truly unbounded randomness". The bell curve only can arise by adding bounds that confine the variety to some single mean value, some single scale of being and not the greater symmetry of fractal being.
All this is part of the same paradigm shift. Physics has been built on closed system perspectives - the bounded equilibrium view. But that is essentially a dead world, gone to its final state. It is a description of nature in which formal and final cause have been excluded - because the system already has been granted fixed bounds and has already got to wherever it wanted to go.
There is a huge sleight of hand going on here that no-one ever notices. But the dead world view is also the one that focuses all the attention on efficient and material causality. So the human imagination finds great value in seeing the physical world as dead (and not pansemiotic) as that then gives it the most freedom to "bring the world alive" with humanity's own god-like animating hand.
But actually, the more generic view of nature is the open systems one. The one that dissipative structure theory now models. Even cosmology is stumbling towards that - but without really considering the metaphysical reasons why that is so.
This is an example of what I'm talking about. Abiogenesis is currently split between the warm alkaline vent model of the origins of life and the stagnant muddy pool model.
The first is about an open dissipative gradient - a proton force at the boundary of alkaline vent water flows and its mixing with acid seawater - that must then get enclosed and harnessed for the manufacture of complex organics.
The other says much the same evolved in a stagnant and dead situation. So it explains the present of the organics - a soup of crud that accumulates as the result of local gone-to-equilibrium chemical processes - but then not the proton motive force that starts to spin the wheels of the metabolism. It has the closure before the open bioenergetic flow. And it seems more logical to have the flow before its closure.
Edit: Another issue for the epistemic cut occurring at the fuzzy boundary of life are modified Wigner's friend experiments showing that the role of an observer in physics may emerge at incredibly small scales, well below scales for the simplest organic molecules. This seems like it would result in two epistemic cuts, one for observation, a second for biologically relevant meaning. — Count Timothy von Icarus
Absolutely. Quantum decoherence has its epistemic cut at the Planck scale. That is where Heisenberg uncertainty defines the fundamental level at which some distinction between the metric background and the entropic action can be made.
Then life and mind have their epistemic cut at the semiclassical nanoscale. This is where molecular machines can first be constructed without being blown apart by entropic forces or quantum uncertainty. Enough bulk properties can emerge for molecular switches and ratchets to be built and used to implement an intentional structure of dissipation-harnessing biological machinery.
I highly recommend Peter Hoffmann's Life's Ratchet: How Molecular Machines Extract Order from Chaos, as a book that sums all this up.
So yes, that is key to making sense of pansemiosis vs biosemiosis. First the wavefunction must be collapsed to create a classical world fit for mechanical structure. Gluing statistical mechanics to quantum mechanics to get thermal decoherence gives you that. The Planckscale is built in because that defines k, or Boltzmann's constant, at the heart of all the thermo/informational maths.
And then - only widely realised in the past 15 years - the nanoscale of physics in warm water is a "magical" convergence zone in the scale of many different forms of energy. Thermal, chemical, mechanical and electrostatic forces all converge to be equivalent in scale - a fact that means one form of energy can be converted into the other forms of energy at "no cost". And this scale is the typical size scale of biological macromolecules. So these molecules can become the free choices of some higher intelligence - the many kinds of devices, such as motor proteins and enzymes, that a living organism throws into the fray to get the chemistry organised and constructing a body with its global intentional structure.
So life and mind are completely an accident of the fact that all the different kinds of physical energies come together in a way that the cost of switching from one form to another is a near frictionless transaction. Only the slightest nudge is needed to convert the potential of a chemical gradient into some useful mechanical action.
Life and mind are thus accounted for by semiosis - the further possibility of nature having codes and modelling relations.
Nature has the open and flowing dissipative gradients. It has a zone of convergence where all its different energies have the same scale. All life had to do was add the judicious nudges that tips these energies in helpful directions. It can then store energy as chemical potentials, and spend energy as acts of material construction.
So biosemiosis is physicalist and material at root. But it is also, as a "four causes" story, the least constrained by its basis in the reductionist paradise of material and efficient cause. It is thus - reciprocally - the most free in terms of being able to then structure reality according to its own wishes and designs.
Phillips and Quake first fingered the significance of this nanoscale convergence zone
in a review paper.
You also have people fiddling around with the possibility of evolution at these incredibly small scales, but they are less convincing (still neat https://www.nature.com/articles/s41598-021-96048-6) — Count Timothy von Icarus
So you can see why this particular approach - which wants to start life off down at the photonic/absolute zero level - makes a big wrong move?
Life and mind arise in an already complex world - the semiclassical nanoscale. You need to have a variety of energies to play off against each other. And you need a warm thermal environment as the free gradient that you ratchet for work.
You even need to start at a classical level above the quantum effects so you can go back in an harness those quantum effects - the quantum tunnelling and entanglement that enzymes and photosynthesis employs.
So the pansemiotic epistemic cut of the Comos has been discovered. It's the Planck scale. And the biosemiotic epistemic cut of life and mind has been discovered. It is the semi-classical convergence zone of the nanoscale chemistry of room temperature solutions.