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PERSPECTIVES

Ideas in their actual context

Each perspective is tied to the question, person, work, and evidence that gives it meaning. Similarity alone never creates a lineage.

56 perspectives

Choose a friction

Do not browse 56 ideas. Enter through one doubt.

Test certainty

Begin where perception, reason, and evidence stop agreeing.

What can we claim to know?

Enter the first perspective

Reconsider a good life

Compare pleasure, virtue, relationships, luck, and material conditions.

What makes a life go well?

Enter the first perspective

Probe the boundary of science

Ask what makes observation, prediction, refutation, and institutions count.

What makes an inquiry scientific?

Enter the first perspective

Four perspectives per question

A map of disagreements

The order is an editorial comparison route, not a claim that one thinker directly caused the next.

01

What can we claim to know?

Examine the differences among true belief, certainty, experience, and luck through three cases and four historical moments, then revisit the grounds for your first judgment.

Compare all four
  1. Lens 11641

    Descartes — Using doubt as a method

    Should every belief be withheld whenever error is possible, or is doubt a test used for a particular purpose?

    4 evidence scenes
  2. Lens 21748

    Hume — Can experience carry us into the future?

    Can we speak of knowledge in ordinary life when our grounds fall short of complete proof?

    7 evidence scenes
  3. Lens 31963

    Gettier — When truth and justification meet by luck

    If truth, belief, and reasonable justification are all present but their connection is accidental, is it knowledge?

    4 evidence scenes
  4. Lens 4Probably around 369 BCE

    Plato — A dialogue that leaves the definition open

    If knowledge is perception, true judgment, or true judgment with an account, why does the dialogue stop without settling on one?

    3 evidence scenes
02

How far can the past support the future?

Distinguish how repetition, domain, controlled comparison, and description change the support that past records give to the next case.

Compare all four
  1. Lens 11748

    Hume — Distinguishing expectation from proof

    Even if repetition explains expectation, does it prove that the future must resemble the past?

    6 evidence scenes
  2. Lens 21843

    Mill — The structure of comparison, not only the count

    Can one well-designed contrast provide stronger grounds than a thousand identical records?

    7 evidence scenes
  3. Lens 31946–1955

    Goodman — Rival descriptions of the same evidence

    With the same observations, why treat some classifications as guides to the future but not others?

    6 evidence scenes
  4. Lens 4Around 1027

    Ibn Sina — Experience with repetition and conditions

    Does extensive repetition yield absolute universality, or only a strong judgment within specified conditions?

    6 evidence scenes
03

How do words point to the world?

Compare two expressions for one object, a description with no matching object, and several uses of one word. Then separate what words point to from what they do.

Compare all four
  1. Lens 11892

    Frege — One object, different modes of presentation

    Does pointing to the same Venus make the meaning and information of the two expressions the same?

    6 evidence scenes
  2. Lens 21905

    Russell — What an empty description contributes

    If there is no person to refer to, is the sentence meaningless, or can we analyze a structure under which it is false?

    7 evidence scenes
  3. Lens 31945 and 1953

    Later Wittgenstein — Words at work in activities

    Can the meaning of the same word be explained only by pairing it with one object?

    7 evidence scenes
  4. Lens 41970 and 1980

    Kripke — Names and descriptions under counterfactual conditions

    Could the same name still refer to the object if that object did not satisfy the description?

    6 evidence scenes
04

What makes a life go well?

Judge three lives shaped by status, relationships, desire, and fortune, then compare distinct accounts from Confucius, Mencius, Aristotle, and Epicurus.

Compare all four
  1. Lens 14th century BCE

    Mencius and the Mengzi — Extending incipient moral responses

    Does having a capacity for goodness mean one is already good, or that small and incomplete responses still need cultivation?

    6 evidence scenes
  2. Lens 24th century BCE

    Aristotle — Activity across a life, not a passing mood

    Is a good life a happy feeling, or a life of acting well in accordance with excellence?

    6 evidence scenes
  3. Lens 34th–3rd century BCE

    Epicurus — Desire, sufficiency, and friendship

    Does treating pleasure as good mean pursuing more of every pleasure?

    6 evidence scenes
  4. Lens 4Confucius, 6th–5th century BCE; later transmitted text

    Confucius and the Analects — Cultivation in relationships and practice

    Is a good life a property one possesses alone, or something cultivated through relationships and repeated practice?

    6 evidence scenes
05

What makes power legitimate and rules fair?

Judge three cases involving safety, equal allocation, and official objection, then compare distinct scopes of justification in Mohism, Mencius, Xunzi, and Rawls.

Compare all four
  1. Lens 11958 and 1971, twentieth century

    John Rawls — Fair terms of cooperation and the basic structure

    If I did not know my social position, which rules for liberty, opportunity, and inequality could I accept?

    6 evidence scenes
  2. Lens 24th century BCE

    Mencius — Humane rule, people's lives, and forfeited status

    If a ruler destroys people's livelihood and trust, can the same obedience still be demanded?

    6 evidence scenes
  3. Lens 3Mohist texts, 5th–3rd century BCE

    Mozi and the Mohists — Public standards, inclusive care, and office

    Can a standard checkable by all restrain a ruler's arbitrariness, or can it also suppress disagreement?

    6 evidence scenes
  4. Lens 4Xunzi, 3rd century BCE; later compilation

    Xunzi — Ritual distinctions, standards, and human judgment

    Do clear standards create a fair order by themselves, or does who applies them and how also matter?

    6 evidence scenes
06

What is real, and what remains through change?

Follow a repaired object, melting ice, and a copied digital object to compare four metaphysical accounts of existence, dependence, and persistence.

Compare all four
  1. Lens 11781

    Kant — The experienced world and things in themselves

    If space and time are forms of our experience, are they a veil over reality or the conditions that make knowledge possible?

    2 evidence scenes
  2. Lens 2Early fifth century BCE

    Parmenides — Does speaking of change require speaking of what is not?

    When we speak of coming-to-be and passing-away, are we really thinking what is not?

    2 evidence scenes
  3. Lens 3Fourth century BCE

    Aristotle — Matter and form, potentiality and actuality

    Can the move from potentiality to actuality explain how something changes while remaining itself?

    2 evidence scenes
  4. Lens 4Second to third century CE

    Nāgārjuna — Emptiness is dependence, not disappearance

    If nothing has an independent essence, are things unreal or real only through relations?

    2 evidence scenes
07

What makes a mind and a self persist?

Use amnesia, bodily duplication, and unfamiliar experience to compare accounts of the self in terms of soul, consciousness, process, and subjectivity.

Compare all four
  1. Lens 11641

    Descartes — The thinking self and the extended body

    If every bodily fact is doubted, does the thinking self remain, and could it exist without the body?

    2 evidence scenes
  2. Lens 21694

    Locke — The same person as far as consciousness reaches

    If consciousness cannot reach a past action, is the present person the one who performed it?

    2 evidence scenes
  3. Lens 31974

    Nagel — Does the bat’s point of view survive physical explanation?

    After every observable fact is collected, does the fact of what it is like for that creature remain?

    2 evidence scenes
  4. Lens 4From the fifth century BCE

    Buddhist not-self — Continuity without an owner

    If experiences form a causal stream, must we posit an unchanging owner behind it?

    2 evidence scenes
08

Can we be responsible if we could not have done otherwise?

Use coercion, habit, prediction, and self-control to separate freedom as alternatives, sourcehood, acting on reasons, and self-understanding.

Compare all four
  1. Lens 11677

    Spinoza — Freedom through understanding, not an uncaused will

    If every action has causes, can understanding those causes make us freer?

    2 evidence scenes
  2. Lens 21748

    Hume — Liberty compatible with necessity

    Does the regular dependence of action on character and desire erase responsibility, or make it possible?

    2 evidence scenes
  3. Lens 31969

    Frankfurt — Acting for one’s own reasons without alternatives

    If an intervener could block every alternative but never touches the actual decision, does the absence of alternatives remove responsibility?

    2 evidence scenes
  4. Lens 4First to second century CE

    Epictetus — What is up to us is judgment and volition

    Can we be free by governing assent to impressions even when external events are not ours to choose?

    2 evidence scenes
09

Why does art matter, and what makes a work valuable?

Follow a perfect copy, a disturbing tragedy, and an everyday experience to compare art as imitation, learning, judgment, and a rhythm of life.

Compare all four
  1. Lens 11790

    Kant — Beauty asks for agreement without proof

    Why can “I like it” carry the expectation that you too ought to find it beautiful?

    2 evidence scenes
  2. Lens 21934

    Dewey — A consummated experience, not merely a museum object

    Can cooking, making, or moving become art when an ordinary activity gains tension and consummation?

    2 evidence scenes
  3. Lens 3Fourth century BCE

    Plato — When a likeness obscures truth and the soul

    Does an accurate likeness give knowledge, or merely look knowledgeable without teaching what is good?

    2 evidence scenes
  4. Lens 4Fourth century BCE

    Aristotle — Learning through imitation and organizing emotion through tragedy

    Why seek fear and grief in tragedy when we avoid them in life, and what do we learn there?

    2 evidence scenes
10

How far can reason speak about faith?

Use a concept-only proof, miracle testimony, and a command that conflicts with ethics to compare proof, testimony, revelation, and practice.

Compare all four
  1. Lens 11077–1078

    Anselm — Faith seeking understanding and an argument for existence

    Does the concept of the greatest conceivable being entail that it exists in reality as well as thought?

    2 evidence scenes
  2. Lens 21748–1779

    Hume — Weighing miracle testimony and arguments from design

    How strong must testimony be when weighed against the chance that the report is mistaken and the chance that a regularity of nature has failed?

    2 evidence scenes
  3. Lens 31843

    Kierkegaard — Faith as a paradox not reducible to ethics

    If Abraham's action cannot be explained by universal ethics, is faith a higher justification or a publicly unverifiable danger?

    2 evidence scenes
  4. Lens 4Around 1095

    Al-Ghazālī — Critiquing unproved necessity, not philosophy wholesale

    Does observed regularity prove necessary causation, or does that add a stronger metaphysical assumption?

    2 evidence scenes
11

What makes an inquiry scientific?

Use an all-explaining theory, an anomaly inside a successful paradigm, and a community closed to criticism to compare testing, history, and social standards of science.

Compare all four
  1. Lens 11620

    Bacon — Organized exclusion instead of hasty generalization

    What changes when observations are designed to eliminate possible explanations rather than collect favorite examples?

    2 evidence scenes
  2. Lens 21934

    Popper — Risky tests rather than piles of confirmations

    Does what a theory forbids matter more than the number of observations that seem to support it?

    2 evidence scenes
  3. Lens 31962

    Kuhn — Normal-science puzzles and paradigm change

    Should a successful research tradition keep solving puzzles despite an anomaly, and when should it change frameworks?

    2 evidence scenes
  4. Lens 41990

    Longino — Objectivity through communities where criticism can work

    Does objectivity depend less on a neutral individual than on structures that expose assumptions to criticism and revision?

    2 evidence scenes
12

Whose knowledge is allowed to count?

Use identity-discounted testimony, an experience without shared concepts, and an exclusionary expert community to examine credibility, language, standpoint, and power.

Compare all four
  1. Lens 11903

    Du Bois — Double consciousness and seeing oneself through others’ eyes

    Is seeing oneself through both one’s own and a dominant society’s eyes only a wound of division, or also an epistemic resource?

    2 evidence scenes
  2. Lens 21949

    Beauvoir — Embodied freedom made into “the Other”

    If “woman” is shaped by social norms rather than natural fact alone, what does the lived standpoint add to knowledge?

    2 evidence scenes
  3. Lens 31952

    Fanon — Racialized experience through language and the gaze

    When a dominant language and others’ gaze alter the meaning of one’s body, can a neutral observer explain the experience fully?

    2 evidence scenes
  4. Lens 42007

    Fricker — Injustice through credibility deficits and missing interpretive resources

    Beyond one false belief, what capacities and participation are taken away when someone is not recognized as a knower?

    2 evidence scenes
13

What do we owe future people and the more-than-human world?

Use delayed ecological damage, choices that change who will exist, and low-probability technological catastrophe to compare moral community, time, identity, and responsibility.

Compare all four
  1. Lens 11949

    Leopold — From conqueror to member of the land community

    How does development change if soils, waters, plants, and animals are fellow members of a community rather than mere property?

    2 evidence scenes
  2. Lens 21979

    Jonas — Greater power of action expands responsibility for the future

    When effects are global, long-term, and irreversible, is an ethics designed for nearby contemporaries sufficient?

    2 evidence scenes
  3. Lens 31984

    Parfit — Can we harm future people whose existence depends on our choice?

    If a better policy would have meant that this person never existed, can the present policy be said to make that person worse off?

    2 evidence scenes
  4. Lens 41993

    Plumwood — Human/nature dualism and the logic of domination

    If human/nature, reason/body, and male/female hierarchies reinforce one logic of domination, can environmental problems be solved by resource management alone?

    2 evidence scenes
14

How should we face suffering and death?

Follow fear before death, enduring suffering, and absurd repetition to compare accounts in terms of sensation, craving, selfhood, despair, and revolt.

Compare all four
  1. Lens 11849

    Kierkegaard — Despair as a sickness in the self-relation

    If despair is not merely sadness but a failed relation of not willing—or willing by oneself alone—to be oneself, what requires care?

    2 evidence scenes
  2. Lens 21942

    Camus — Lucid revolt without dissolving the absurd

    If the clash between our demand for meaning and a silent world persists, can one live on without suicide or false hope?

    2 evidence scenes
  3. Lens 3Around the fifth century BCE

    Early Buddhism — Suffering, its cause, cessation, and a path

    What changes if suffering is read not as a pessimistic verdict on all life but as a diagnosis with causes and a possible cessation?

    2 evidence scenes
  4. Lens 4Fourth to third century BCE

    Epicurus — Death is nothing to us

    If death is absent while we exist and we are absent when death arrives, what reason remains to fear it in advance?

    2 evidence scenes