Pip: When a philosophy of science decides the safest move is to stay silent about whether reality exists, you have to wonder what it's saving its voice for.

Mara: That tension is exactly what surtymind is working through — a close reading of behavioural pragmatism, Quine's Darwinian answer to a shared-perception problem, and what it means to call a scientific framework a-ontological rather than anti-realist. Let's start with Barnes-Holmes, Quine, and the question of whether behaviourism can stay neutral on reality.

Barnes-Holmes, Behaviourism, and the Ontology Problem

Pip: The starting point is a specific dispute: Barnes-Holmes argued that Quine only ignored the problem of homology — how different people converge on the same meanings for observation sentences — rather than solving it. The post examines whether that criticism holds, and what Quine's actual Darwinian answer was.

Mara: The post sets up Quine's real response by quoting his animal-conditioning example directly. The setup is that perception can be studied through behavioural criteria, and here is how Quine illustrates it: "suppose we provide an animal with a screen to look at and a lever to press. He finds that the pressed lever brings a pellet of food when the screen shows a circular stripe, and that it brings a shock when the screen shows four spots spaced in a semi-circular arc. Now we present him with these same four spots, arranged as before, but supplemented with three more to suggest the complementary semicircle. If the animal pressed the lever, he may be said to have perceived the circular Gestalt rather than the component spots."

Pip: So the upshot is that Quine is not just waving the homology problem away — he is grounding shared perception in a partially innate similarity space, shaped by natural selection, and testable through exactly this kind of behavioural experiment. Barnes-Holmes missed that move entirely.

Mara: And the post argues that omission matters, because Barnes-Holmes's own behavioural pragmatism rests on three assumptions — that what is known is always a behavioural function, that each organism participates in a distinct behavioural stream, and that the behaviourist's own activity is likewise stream-bound. The third assumption is where the a-ontological stance is grounded.

Pip: The logic being: if your own theorising is a product of your learning history, a different history gives you a different theory, so you can never claim an immutable ontological truth. Which sounds modest until you notice it also commits you to staying silent about Cyanobacteria.

Mara: That is the post's sharpest challenge. Barnes-Holmes defines objects through behavioural functions — conditioning responses, discriminative stimuli, verbal repertoires. But those capacities evolved recently. The post points out that Cyanobacteria predate conditioned learning by billions of years, which means the framework appears committed to denying their mind-independent existence before sufficiently complex behavioural agents arrived.

Pip: Barnes-Holmes's reply is that he is not anti-realist but a-ontological — remaining silent on behaviour-independent reality rather than denying it.

Mara: The post finds that distinction unstable. Barnes-Holmes does allow ontological talk in experimental reports, but insists it carries no genuine commitment. And his definition of truth reduces to prediction and control. As the post puts it, that prioritisation is arbitrary — why prediction and control over explanatory depth?

Mara: The post also notes that Quine's ontology is not the Platonic, immutable-essences kind Barnes-Holmes targets. Quine's entire framework is built on radical revisability — no part of the web of belief is immune from revision, including logic. So the criticism that ontological realism requires absolute, final truths simply does not land against Quine.

Pip: A behaviourism that stays silent on reality while quietly using realist assumptions to run its experiments — that tension points straight toward what naturalism is actually asking of us.

Mara: The deeper question the post leaves open is whether any framework can genuinely be a-ontological, or whether silence on reality is itself a position.

Pip: Quine at least named his assumptions. That honesty about the web of belief is worth something — next time, we keep pulling that thread.