Persona #175
Ernst Mach
1838–1916 · Austrian physicist and philosopher; founder of empiriocriticism and Mach's principle
Sensations as the elements — radical empiricist phenomenalism that shaped Einstein, Vienna Circle, and the relational tradition
"The Analysis of Sensations" (1886) reduced both physical objects and the self to complexes of sensations (Empfindungen) — there is no thing-in-itself behind appearance, only the lawful regularities of sense-elements. "The Science of Mechanics" (1883) reframed Newtonian mechanics as a relational system, arguing that inertia is determined by the totality of distant matter ("Mach's principle") — a doctrine that profoundly influenced Einstein's general relativity. Mach's phenomenalist epistemology shaped Bertrand Russell, Bridgman's operationalism, and the entire Vienna Circle program. Lenin's "Materialism and Empirio-Criticism" (1909) is an extended polemic against Mach. His refusal to accept the reality of atoms (against Boltzmann) is the one substantive scientific question on which history sided against him.
Key works
- The Science of Mechanics (1883)
- The Analysis of Sensations (1886)
- Popular Scientific Lectures (1895)
- Knowledge and Error (1905)
Declared Influences
Neutral Monism 35%
Phenomenalism 30%
Empiricism 25%
Logical Positivism 25%
Relationalism 20%
Neutral Monism
35%
Mach is the principal nineteenth-century neutral monist; his sensations are neutral elements that are neither mental nor physical until embedded in functional relations.
"The elements of which I speak are colors, sounds, pressures, spaces, times — what we ordinarily call sensations." (The Analysis of Sensations)
Phenomenalism
30%
Mach is the foundational late-nineteenth-century phenomenalist; physical objects are logical constructions out of sensations.
"Bodies do not produce sensations; complexes of sensations form bodies." (The Analysis of Sensations)
Empiricism
25%
Mach is one of the principal heirs of the British empiricist tradition; his radical empiricism took Hume's program further than Hume.
"All metaphysical elements are to be eliminated as superfluous and as destructive of the economy of science." (The Science of Mechanics)
The Vienna Circle named the lecture hall they met in the Ernst Mach Society; the program of eliminating metaphysics from scientific discourse is directly continuous with Mach's.
"The verification principle: only what reduces to sensations and their regular connections is meaningful." (Mach's programme, anticipating Carnap-Schlick)
Relationalism
20%
Mach's principle (inertia is determined by distant matter, not by absolute space) is the foundational modern statement of relationalism about space and motion.
"When we say that a body preserves unchanged its direction and velocity in space, our assertion is nothing more nor less than an abbreviated reference to the entire universe." (The Science of Mechanics, ch. II.6)
Internal Tensions
Mach's refusal to accept atoms as real (rather than as useful instrumental fictions) was the principal substantive scientific question on which his phenomenalism was wrong: Einstein's 1905 paper on Brownian motion provided the experimental case for atomic reality that Mach's programme could not absorb. The instrumentalist methodology survived this defeat in modified form (van Fraassen's constructive empiricism, etc.).
⧖
I. Time
Relational time; the concept of duration is abstracted from the regularities of sensation-sequences.
Attributes
Extent: Infinite
Ontological Status: Relational
Grain: Continuous
Freedom: Deterministic
Traversability: Linear
Direction: Uni-directional
Dimensionality: One
✦
II. Space
Relational space (Mach's principle); the concept of place is abstracted from the relations among bodies, not from an absolute container.
Attributes
Extent: Infinite
Ontological Status: Relational
Curvature: Flat
Dimensionality: Three
Locality: Local
◉
III. Matter
Emergent — bodies are stable complexes of sensations, not substrates beneath them.
Attributes
Extent: Infinite
Ontological Status: Emergent
Conservation: Conserved
Dimensionality: Three
Locality: Local
◎
IV. Observer
Plural embodied observers; mediated knowledge through sensations; no metaphysical agency.
Attributes
Time Instance: Single
Space Instance: Single
Knowledge Extent: Mediated
Knowledge Retainment: Partial
Physicality: Embodied
Agency: Active
Number: Plural
Metaphysical Agency: None
⚡
V. Energy
Standard physics; energy is itself a complex of sensation-regularities for Mach.
Attributes
Extent: Infinite
Ontological Status: Substantival
Conservation: Conserved
Dispersibility: Irreversible
⧉
VI. Information
Information conserved at the world-scale through the regularities of sensation; personal self dissolves into the stream.
Attributes
Ontological Status: Substantival
Cosmic Conservation: Conserved
Personal Conservation: Non-conserved
Granularity: Continuous
Classified works
Works in the atlas that Ernst Mach authored or that draw on this persona's writings, with full attribute fingerprints of their own.
Computed school proximity
The persona's attribute fingerprint scored against all 202 schools using the same quiz scorer. Useful as a sanity check on the hand-curated influences above.
Philosophical neighbors
Other personas whose attribute fingerprint sits closest to Ernst Mach's — intellectual neighbors across traditions and eras.
82%
Thales of Miletus — c. 624–546 BCE
25/28
82%
Democritus of Abdera — c. 460–c. 370 BCE
27/31
81%
Rudolf Carnap — 1891–1970
27/31
77%
Gottfried Wilhelm Leibniz — 1646–1716
25/31
77%
Anaximander of Miletus — c. 610–546 BCE
25/29
74%
David Bohm — 1917–1992
25/31
74%
David Lewis — 1941–2001
26/31
74%
Alan Turing — 1912–1954
25/31
How Ernst Mach resolves each dilemma
56 resolved positions across 4 dimensions, including 13 distinctive where the majority of schools go the other way · 1 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?
Time arises from events or from a deeper substrate — the future is not yet.
32%
Is regret rational?
The past is not a thing now; regret is the present holding what is no longer.
32%
Do we owe extinct species something we cannot give them?
Past species no longer exist; what we owe is to the present and the future.
32%
Matter · 7 dilemmas · 3 distinctive
What stuff is — fundamental, relational, or appearance.
Distinctive · only 23% of schools agree
(47/202)
Is the world created from nothing?
Creatio ex nihilo is one of the most distinctive Western-theological claims. Whether matter was created from nothing, eternally exists, or is sustained moment-by-moment turns on what kind of thing matter is.
Matter is real but emerges from something deeper — neither bedrock nor created-from-nothing.
On this view, matter is genuinely there, but it isn't the floor of reality. It depends on something more fundamental — dependent origination, mind, divine sustaining act, computational substrate, or the structure of conditions — and is conserved only at its own level of description. …
Roads not taken
Yes — matter was created and is conserved as a real substance. (55%) ·
Matter is constituted by relations; the question of 'from what?' presupposes substance. (16%) ·
Matter arises and dissolves through cosmic rounds; neither created from nothing nor eternal. (4%)
Distinctive · only 23% of schools agree
(47/202)
Is the physical world fully real?
Realists, idealists, and relationalists divide on whether matter exists mind-independently, derivatively, or as a pattern of relations. The split runs deeper than any single scientific question.
Real but sustained — not mind-independent in the strict realist sense.
On this view, the physical world is real enough — it has its own laws, its own conservation principles, its own resistance to wish — but it is not the floor of being. It is sustained by something else: mind, divine attention, computational substrate, or …
Roads not taken
Yes — the physical world is fully real, mind-independent, persisting. (55%) ·
Real as relations — neither pure substance nor pure construction. (16%) ·
Real for this cycle — the deepest reality cycles through creation and dissolution. (4%)
Distinctive · only 23% of schools agree
(47/202)
Does matter have intrinsic moral standing?
Do rocks, soil, rivers, and stuff in general deserve moral consideration — or only the living, the conscious, the human? The answer turns on what matter is.
Matter is morally considerable derivatively — through what it sustains.
On this view, matter doesn't have standing on its own; it has standing through what it makes possible. Soil matters because it grows food; water matters because it sustains life and mind and practice. Asking whether the rock as such has moral standing slightly misreads …
Roads not taken
Matter is morally considerable insofar as it is created or conserved good. (55%) ·
Matter has intrinsic moral standing as part of the relational fabric. (16%) ·
Matter is in flux; standing is impermanent and ritual-mediated. (4%)
4 mainstream positions
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 · 4 distinctive
Mind, agency, and the knower's relation to the known.
Distinctive · only 15% of schools agree
(31/202)
What is our place in nature?
Whether humans are masters of nature, members of nature, or makers of nature is not a question climate science can settle. It depends on what nature is, what we are, and what kind of relationship is possible between us.
Nature is partly what we make of it — concepts, practices, and minds shape the world.
On these views, the 'nature' we live in is not a stand-alone given but something co-constituted by the categories, concepts, technologies, and practices through which we encounter it. There is a world prior to our practices, but what shows up in it as significant, real, …
Roads not taken
Active in a real nature — we cultivate, steward, transform. (48%) ·
Embedded in a web — partners with the more-than-human world. (15%) ·
Subject to a real natural order we did not make. (12%)
Distinctive · only 15% of schools agree
(31/202)
Should we colonize space?
The drive to extend human presence beyond Earth is sometimes framed as the next chapter of stewardship, sometimes as hubris, sometimes as escape from problems we ought to solve here. Which it is depends on what we take our relationship to nature to be.
The 'space frontier' is partly what we make of it.
On these views, space is not a given canvas on which we paint; it is one more domain that is constituted, in part, by the categories, practices, and imaginations we bring to it. What 'colonisation' even means is a function of frames we choose. The …
Roads not taken
Cultivating worlds beyond Earth is the next form of stewardship. (48%) ·
Colonisation continues the work that ended the wisdom of seven-generation thinking. (15%) ·
Nature includes its limits; colonisation is bounded by what the cosmos allows. (12%)
Distinctive · only 15% of schools agree
(31/202)
Is genetic engineering of food stewardship or domination?
Editing the genomes of the plants and animals we eat is either the natural continuation of breeding — careful improvement of what is given — or a category error that treats biology as raw material rather than as living kind.
What counts as a 'natural' genome is itself a construction.
On these views, the line between 'natural' and 'modified' organisms is partly drawn by the categories we use. Domesticated wheat, hybridised corn, selectively-bred cattle are all 'modifications' that prior generations called natural. The salient question is not whether to modify but which modifications, by whom, …
Roads not taken
Genetic modification is cultivation by other means. (48%) ·
Editing the genome cuts into the relational fabric; we should be very slow. (15%) ·
Biology is what it is; we modify it within real biological constraints. (12%)
Distinctive · only 18% of schools agree
(37/202)
What happens to "you" when you die?
Whether anything of you persists — and in what sense — depends on what you take a person to be.
You were always a pattern. The pattern propagates.
There was never a "substantial you" to lose. What was real was a pattern of relations — bodily, memorial, social, causal. Those relations don't terminate at the body; they ripple forward through everyone and everything you touched.
Roads not taken
A soul continues into another mode of being. (37%) ·
Death is genuinely the end. (30%) ·
Individuality dissolves into the One. (8%)
32 mainstream positions
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%
Is truth universal, tradition-bound, situated, or constructed?
Truth is mind-independent, universal, accessible in principle to all.
65%
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%
Does environmental harm in another country bind me morally?
Moral obligation tracks the relations one is in; distance does matter, structurally.
50%
Can prayer for someone far away affect them?
Prayer changes the pray-er, not the prayed-for.
49%
Are coincidences ever more than coincidence?
Coincidence is exactly what the math says it is. The pattern is in the noticer.
49%
Is divine omniscience compatible with human freedom?
The observer is in time; foreknowledge across times raises real freedom problems.
46%
Does meditation reveal something genuinely timeless?
Meditators are bounded observers reporting unusual brain states; the 'timeless' is metaphorical.
46%
Does prayer change God's mind?
If there is an addressee at all, it is in time; prayer is communication, and may genuinely change what comes next.
46%
Are the dead morally present to the living?
Observers are bounded by their own moment, and no further agency makes the dead present.
44%
What kind of religious-theological authority does the tradition recognize?
The category does not apply — the school is non-religious.
44%
Who is the moral primary — the individual, the community, the cosmos, the class, or the species?
The discrete person is the moral primary.
40%
Is reality fundamentally digital?
No — continuous fields, classical limits, analog deep structure.
37%
Are there indivisible units of experience?
No — continuous Jamesian stream, phenomenological lived time.
37%
Is memory stored or reconstructed?
Reconstructed — continuous re-narrating, no fixed engrams.
37%
Does history have a direction or meaning?
History is not where the deepest truth lives.
37%
What makes someone the same person over time?
You are your body — continuity is bodily continuity.
36%
Is the late-stage dementia patient still the person their spouse married?
Same body, same person — even when the cognitive pattern has changed.
36%
If a teleporter copied and destroyed you, would you have survived?
Different body, different person — you died in the scanner.
36%
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%
How is knowledge of reality produced?
Through controlled empirical investigation.
17%
Could an AI have a mind that matters?
Yes — mind is a pattern, not a substrate.
9%
Do animals have moral standing comparable to humans?
If the pattern of mind is there, the standing is there — regardless of species.
9%
Could a fetal brain organoid in a petri dish be conscious?
If the pattern is present at sufficient complexity, the experience is present too.
9%
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%
Films Referencing This Persona (4)
Either directly referenced in the film, or reading the film through one of this persona's top schools.
Experiments Engaging This Persona's Schools
Surface via influence-schools that respond to the experiment. Each entry shows the school through which the connection runs.
Philosophical Zombies
Both the mental and the physical are aspects of a more fundamental substrate; zombies are impossible because the physical description, when complete, includes the neutral …
The Millikan Oil-Drop Experiment
The "elementary charge" is a theoretical posit that reduces, on close inspection, to a pattern in observations. Phenomenalists accept the data and demur on the …
Newton's Prism Experiment
The spectrum is real as a pattern of sensation; the inferred "constituents" of white light are theoretical posits useful for organising those sensations. Phenomenalists demur …
Brownian Motion / Perrin's Confirmation
A challenge to strict phenomenalism: the convergence across methods is hard to read as anything but evidence for unobservable but real entities. Phenomenalists must either …
Galileo's Falling Bodies
Granting the elegance, empiricists insist the conclusion still required the inclined-plane experiments to be confirmed. The thought experiment narrows the space of possible laws; observation …
Descartes' Evil Demon
The hyperbolic doubt is incoherent: any standard for genuine doubt presupposes some background of fixed belief. Hume, Reid, and the British empiricists treat the demon …
Galileo's Inclined Plane
A canonical empirical foundation for mechanics: laws of motion derived from carefully designed observation, not from Aristotelian categories.
Mary's Room
If "what red is like" cannot be stated in observation language, the claim that Mary learns it adds no meaningful content — the apparent gain …
The Double-Slit Experiment
Asking what the particle "really does" between measurements is empirically vacuous: only the distribution of detection events is meaningful. The Born rule is the theory; …
The Michelson–Morley Experiment
A model case for the verifiability criterion: the aether was unobservable in principle once the Lorentz contraction repaired it, and hence cognitively empty. Michelson–Morley made …
Bell Test Experiments
Relational quantum mechanics (Rovelli): properties exist only relative to systems with which they are correlated. There is no "view from nowhere" from which to ask …
Wigner's Friend
Relational QM (Rovelli) takes Wigner's friend as the argument: properties exist only relative to systems that interact with them. There is no "view from nowhere" …
Einstein's Elevator
A vindication: gravity is not an absolute force acting between bodies but a feature of relations among frames of reference. The equivalence principle is continuous …