Works › Empiricism, Semantics, and Ontology
Work #1617 · Late period

Empiricism, Semantics, and Ontology

Carnap's 1950 paper distinguishing internal from external ontological questions

Rudolf Carnap · 1950 · English · Philosophical paper

Tradition: Logical positivism / Vienna Circle / philosophy of language

Carnap's 1950 'Empiricism, Semantics, and Ontology' — internal vs external ontological questions

Published in Revue Internationale de Philosophie 4 (1950), pp. 20-40, 'Empiricism, Semantics, and Ontology' is Carnap's classic late paper on the philosophy of ontology and one of the most-cited papers in twentieth-century analytic philosophy. Carnap distinguishes two kinds of question about existence: 'internal questions' (questions of fact within a chosen linguistic framework — 'Are there prime numbers greater than 100?', 'Are there electrons?', 'Are there unicorns?' — to be answered by the empirical or logical procedures of the framework); and 'external questions' (questions about whether to adopt a linguistic framework at all — 'Are there numbers?', 'Are there physical objects?', 'Are there abstract entities?' — which, on Carnap's analysis, are not factual questions at all but pragmatic-practical questions about which framework to adopt). The paper's central polemical target is Quine's then-recent 'On What There Is' (1948), which had argued that ontological questions are continuous with scientific questions; Carnap argues, against Quine, that the appearance of continuity disguises a fundamental difference in kind between internal questions (which are factual and answered by ordinary procedures) and external questions in their metaphysical reading (which are pseudoquestions). The paper articulates the mature Carnap position on tolerance: any consistent linguistic framework may be adopted; the choice among frameworks is pragmatic; metaphysical disputes about which framework 'really' captures the way things are are confused. Quine's reply ('On Carnap's Views on Ontology', 1951, later expanded in 'Two Dogmas of Empiricism', 1951) was the founding document of the alternative naturalistic position; the Carnap-Quine debate has shaped six decades of analytic-philosophy debate over ontology.

Author

Editions cited

  • Empiricism, Semantics, and Ontology, Revue Internationale de Philosophie 4 (1950), 20-40
  • Reprinted in Carnap, Meaning and Necessity (2nd ed., University of Chicago Press, 1956), Appendix A
  • Widely anthologised: Paul Benacerraf and Hilary Putnam (eds.), Philosophy of Mathematics (Prentice-Hall, 1964, 2nd ed. Cambridge 1983); Robert M. Harnish (ed.), Basic Topics in the Philosophy of Language (Prentice-Hall, 1994)
  • Critical context: Richard Creath (ed.), Dear Carnap, Dear Van: The Quine-Carnap Correspondence and Related Work (UC Press, 1990); Alan Richardson and Thomas Uebel (eds.), The Cambridge Companion to Logical Empiricism (Cambridge, 2007)
Compare this work

School Embodiments

Logical Positivism · 30%
Analytic Metaphysics / Logical Atomism · 18%
Philosophy of Language · 18%
Pragmatism · 16%
Empiricism · 12%
Phenomenalism · 6%
Analytic Philosophy · 8%
Logical Positivism 30%

Defining late-Carnapian-positivist ontological methodology.

"Internal vs. external questions." (Empiricism, Semantics, and Ontology, §§2-3)
Analytic Metaphysics / Logical Atomism 18%

Major analytic-metaphysical-paper — Quine's main target.

"Ontological questions are pseudoquestions outside a framework." (Empiricism, Semantics, and Ontology, conclusion)
Philosophy of Language 18%

Linguistic-framework analysis of ontology.

"Linguistic framework as the level at which questions of existence are settled." (Empiricism, Semantics, and Ontology, §2)
Pragmatism 16%

Pragmatic-practical attitude to framework choice.

"The acceptance of a framework is a pragmatic decision." (Empiricism, Semantics, and Ontology, §3)
Empiricism 12%

Empiricist methodological background.

"Empiricist criteria for framework acceptance." (Empiricism, Semantics, and Ontology)
Phenomenalism 6%

Implicit anti-realist attitude to external metaphysical questions.

"Metaphysical realism as pseudoproblem." (Empiricism, Semantics, and Ontology)
Analytic Philosophy 8%

Analytic-philosophical tradition.

Internal Tensions

Defining late-Carnapian paper; the founding document of the Carnap-Quine debate over the nature of ontological commitment. Quine's 'On What There Is' (1948) and the subsequent 'Two Dogmas' (1951) were aimed at this kind of position; the Carnap-Quine debate has been continuously productive in analytic philosophy through Putnam, Chalmers, Eli Hirsch, and contemporary metaontology.

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I. Time

1950. Carnap was 59 and at the University of Chicago; the paper would be reprinted as Appendix A of the second edition of Meaning and Necessity (1956).

Attributes
Extent: Infinite Ontological Status: Substantival Grain: Continuous Freedom: Deterministic Traversability: Linear Direction: Uni-directional Dimensionality: One
✦

II. Space

Chicago (Carnap's institutional base since 1936, after the Vienna Circle's dispersal and Carnap's emigration via Prague to the US).

Attributes
Extent: Infinite Ontological Status: Substantival Curvature: Curved Dimensionality: Three Locality: Local
◉

III. Matter

Single 21-page philosophical paper. Form is essay-philosophical with extensive footnotes engaging contemporary work (especially Quine 'On What There Is', 1948).

Attributes
Extent: Infinite Ontological Status: Substantival Conservation: Conserved Dimensionality: Three Locality: Local
◎

IV. Observer

Late Carnap. The observer-philosopher is the most prominent surviving member of the Vienna Circle, defending a refined version of logical-empiricist tolerance against the rising naturalist-analytic alternative.

Attributes
Time Instance: Single Space Instance: Single Knowledge Extent: Mediated Knowledge Retainment: Partial Physicality: Embodied Agency: Active Number: Plural Metaphysical Agency: Impersonal
⚡

V. Energy

Late-Carnapian-positivist energies. The paper is one of Carnap's most polished philosophical writings — the late Carnap at his most concise and most accessible.

Attributes
Extent: Infinite Ontological Status: Substantival Conservation: Conserved Dispersibility: Irreversible
⧉

VI. Information

Single influential paper. The internal-external distinction and the linguistic-framework apparatus are the central informational structure.

Attributes
Ontological Status: Substantival Cosmic Conservation: Conserved Personal Conservation: Non-conserved Granularity: Continuous

Personas that cite this work

Rudolf Carnap Willard Van Orman Quine Hilary Putnam David J. Chalmers

Personas with the nearest attribute fingerprint

Historical figures whose own classification on the same six-dimensional grid lands closest to this work's. Computed by attribute-agreement on coordinates both address.

100%
Thales of Miletus
29/29
97%
Rudolf Carnap
33/34
97%
Anaximander of Miletus
29/30
94%
C. D. Broad
32/34
94%
Carl Sagan
32/34
94%
David Lewis
32/34

Computed school proximity

The work's attribute fingerprint scored against all schools using the same quiz scorer. Useful as a sanity check on the hand-curated embodiments above.

76%
Latin Averroism
22/26
74%
Virtual Realism
23/26
73%
Structuralism
22/26
72%
Mechanism
22/26
70%
Deism
23/26
70%
Philosophy of Science
23/26
70%
Analytic Philosophy
23/26
68%
Modal Realism
22/26

How Empiricism, Semantics, and Ontology resolves each dilemma

34 resolved positions across 4 dimensions, including 6 distinctive where the majority of schools go the other way · 23 unaligned.

Each dimension is sorted so minority positions come first. Mainstream positions are folded into an expandable list.

Time · 9 dilemmas · 5 distinctive

Persistence, the future, and the direction of becoming.

Distinctive · only 9% of schools agree (18/202)
Do you really choose?
If the brain is a physical system and physical systems are governed by laws, then every choice is also a chain of causes — which raises the question of what was really left to choose.
Choice is real within a determined order — agency and determinism aren’t opposites.
On this view, the future is determined and you are genuinely choosing. Those aren't contradictory because the determination runs through you rather than around you: your reasoning, deliberation, and assent are the way the determined outcome gets settled. Choice is what it feels like from …
Roads not taken The future is open and you are a genuine origin of it. (69%) · Choice is structural illusion — every event is fixed by the prior state. (10%) · Even if the universe is undetermined, you are not the chooser. (6%)
Distinctive · only 9% of schools agree (18/202)
Are addicts responsible for their addiction?
Addiction looks from one angle like the textbook case of agency failing — a person doing what they don't, in any meaningful sense, want to do. From another angle it looks like agency at work in hard conditions. Which it is depends on what agency is.
The addict is genuinely responsible within a determined order.
On this view, the addict is acting within a determined order but is genuinely acting — making decisions, endorsing or resisting urges, seeking or refusing help. Responsibility attaches not because some uncaused choice happened, but because the addict is the kind of agent through which …
Roads not taken The addict could have chosen otherwise — that's why recovery is real. (69%) · The addict's behaviour is the outcome of causes; 'responsibility' is a useful fiction, not a metaphysical fact. (10%) · Even if the universe is undetermined, the addict isn't the chooser. (6%)
Distinctive · only 9% of schools agree (18/202)
Should we hold AI systems responsible for what they do?
When an autonomous AI takes an action that harms someone, the question of who or what is responsible — the developer, the operator, the model itself — turns on whether the model is the kind of thing that can be a responsible agent.
The AI can be a genuine agent within determined conditions — and therefore genuinely responsible.
On this view, what makes a being responsible is not indeterminism but the kind of process the being is. An AI that deliberates, considers consequences, can be given reasons, and modifies its behaviour on reflection is doing what responsible agency is, even if its underlying …
Roads not taken An AI without a free will is not the kind of thing that can be responsible. (69%) · An AI's behaviour is fully determined by training and input; 'responsibility' applies if at all to its makers. (10%) · Neither AIs nor anyone else are the locus of free agency; the question is the wrong one. (6%)
Distinctive · only 15% of schools agree (31/202)
Is the universe running out of usable energy?
The heat death of the universe — entropy maxed out, no further work possible — is among the more sobering implications of mainstream physics. Whether it is structurally inescapable depends on what kind of finitude the cosmos has.
Both time and matter are unbounded; 'running out' is misframed.
On this view, the cosmos has neither a temporal horizon nor a material exhaustion point. The framing of running out presupposes bounds that the cosmos doesn't have. Energy gradients perpetuate; new configurations emerge; the categories that make heat-death scary don't apply at the cosmic scale.
Roads not taken Time is unbounded but matter is finite; usable energy can fail without time failing. (47%) · Time both has and lacks bounds depending on the level you ask at; finitude is conventional. (26%) · The cosmos has bounds; heat death is a real horizon. (12%)
Distinctive · only 15% of schools agree (31/202)
Are natural resources fundamentally finite, or only practically so?
Whether we can grow our way out of resource constraints — or whether the cosmos sets limits the economy ultimately must obey — depends on what kind of finitude matter has.
Resources are practically inexhaustible on cosmic scales; terrestrial limits are engineering.
On this view, matter and time are both unbounded at the largest scales. Terrestrial resource limits are real engineering and political constraints but not metaphysical ones; the cosmos can in principle support whatever expansion intelligence is capable of.
Roads not taken Time goes on but matter is bounded; we are eventually constrained even with infinite time. (47%) · The finitude question is level-dependent; resource ethics happens at the level that constrains us. (26%) · Resources are finite in the strict sense; living well requires accepting the limit. (12%)
4 mainstream positions
Could we owe future generations more than is materially possible to provide? Both time and matter are unbounded; we cannot in principle owe more than is possible. 15% How much weight do future people deserve? Future people are as real as you are — and their interests count for as much. 47% Is regret rational? The past is as real as the present; regret is a real attitude toward a real thing. 47% Do we owe extinct species something we cannot give them? Extinct species are as real as we are; they have standing. 47%
Matter · 7 dilemmas, all mainstream
Is the world created from nothing? Yes — matter was created and is conserved as a real substance. 55% Is the physical world fully real? Yes — the physical world is fully real, mind-independent, persisting. 55% Does matter have intrinsic moral standing? Matter is morally considerable insofar as it is created or conserved good. 55% What is money? Money is a real institution with intrinsic features. 54% What is a nation? A nation is a real moral community with intrinsic character. 54% What makes someone male or female? Sex is a real biological kind with given content. 54% Should we edit the human germline? Human nature is a real biological kind given by reproductive biology or by creation; editing the germline transgresses what is given. 54%
Observer · 37 dilemmas, all mainstream
Could causation work backwards? Causation runs one way — the arrow of time is real and structural. 68% Is the asymmetry between memory and anticipation a real feature of time, or just of us? The asymmetry is real because time itself has a real direction. 68% Is the arrow of time a real feature of the cosmos, or only of how we describe it? The arrow is real and structural; the asymmetry isn't an artifact of description. 68% Is environmental damage ever truly permanent? Damage is real and permanent on the relevant timescales. There is no recovery; there is only limitation. 66% Can a civilization recover from collapse? Civilizational complexity is hard to build and easy to lose; recovery is at best partial. 66% Does the second law of thermodynamics mean something morally? Entropy is what time is. The moral weight, if any, is the weight of working against the current. 66% When does a person begin? A person exists from conception — when a new being comes into existence. 54% What is marriage? Marriage has a given form — it’s a kind of thing we recognize, not make. 54% What is our place in nature? Active in a real nature — we cultivate, steward, transform. 48% Should we colonize space? Cultivating worlds beyond Earth is the next form of stewardship. 48% Is genetic engineering of food stewardship or domination? Genetic modification is cultivation by other means. 48% Should we trust expert testimony when we can't verify it? Trust expertise whose conclusions a competent mind can in principle reproduce. 32% Is religious revelation a real source of knowledge? Revelation is evaluable by reason — and not above it. 32% Does an LLM 'know' the things it correctly produces? An LLM can produce correct outputs but not reason to them; useful, not knowing. 32% Are coincidences ever more than coincidence? — — Are the dead morally present to the living? — — Are there indivisible units of experience? — — Can prayer for someone far away affect them? — — Could a fetal brain organoid in a petri dish be conscious? — — Could an AI have a mind that matters? — — Do animals have moral standing comparable to humans? — — Does environmental harm in another country bind me morally? — — Does history have a direction or meaning? — — Does meditation reveal something genuinely timeless? — — Does prayer change God's mind? — — How is knowledge of reality produced? — — If a teleporter copied and destroyed you, would you have survived? — — Is divine omniscience compatible with human freedom? — — Is memory stored or reconstructed? — — Is reality fundamentally digital? — — Is salvation, liberation, or fulfillment individual or communal? — — Is the late-stage dementia patient still the person their spouse married? — — Is truth universal, tradition-bound, situated, or constructed? — — What happens to "you" when you die? — — What kind of religious-theological authority does the tradition recognize? — — What makes someone the same person over time? — — Who is the moral primary — the individual, the community, the cosmos, the class, or the species? — —
Information · 4 dilemmas, all mainstream
Is anything truly lost when someone forgets? Information is lost when a mind forgets; matter and energy continue, but the pattern is gone. 51% Does deleting your data online destroy something real? Information is genuinely lost when the substrate that hosted it goes; deletion really destroys. 51% Could the dead, in principle, be brought back? The information dissipates with the substrate; restoration is in principle impossible. 51% Is forgiveness ontologically possible? The offense is locally constituted by its substrate; when the substrate dissolves, the offense genuinely passes away. 51%
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