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If Pressed To Supplement Tweedledee's Ostensive Definition Of Logic With A Discursive Definition Of The Same Subject, I Would Say That Logic Is The Systematic Study Of The Logical Truths. Pressed Further, I Would Say That A Sentence Is Logically True If All Sentences With Its Grammatical Structure Are True. Pressed Further Still, I Would Say To Read This Book.

-Willard Van Orman Quine

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If Pressed To Supplement

Willard Van Orman Quine

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If Pressed To Supplement Tweedledee's Ostensive Definition Of Logic With A Discursive Definition Of The Same Subject, I Would Say That Logic Is The Systematic Study Of The Logical Truths. Pressed Further, I Would Say That A Sentence Is Logically True If All Sentences With Its Grammatical Structure Are True. Pressed Further Still, I Would Say To Read This Book.

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The Strategy Of Semantic Ascent Is That It Carries The Discussion Into A Domain Where Both Parties Are Better Agreed On The Objects (viz., Words) And On The Main Terms Connecting Them. Words, Or Their Inscriptions, Unlike Points, Miles, Classes And The Rest, Are Tangible Objects Of The Size So Popular In The Marketplace, Where Men Of Unlike Conceptual Schemes Communicate At Their Best. The Strategy Is One Of Ascending To A Common Part Of Two Fundamentally Disparate Conceptual Schemes, The Better To Discuss The Disparate Foundations. No Wonder It Helps In Philosophy.

A Curious Thing About The Ontological Problem Is Its Simplicity. It Can Be Put Into Three Anglo-saxon Monosyllables: 'what Is There?' It Can Be Answered, Moreover, In A Word--'everything'--and Everyone Will Accept This Answer As True.

Unscientific Man Is Beset By A Deplorable Desire To Have Been Right. The Scientist Is Distinguished By A Desire To Be Right.

No Two Of Us Learn Our Language Alike, Nor, In A Sense, Does Any Finish Learning It While He Lives.

The Lore Of Our Fathers Is A Fabric Of Sentences. A Pale Gray Lore, Black With Fact And White With Convention.

At Root What Is Needed For Scientific Inquiry Is Just Receptivity To Data, Skill In Reasoning, And Yearning For Truth. Admittedly, Ingenuity Can Help Too.

Linguistically, And Hence Conceptually, The Things In Sharpest Focus Are The Things That Are Public Enough To Be Talked Of Publicly, Common And Conspicuous Enough To Be Talked Of Often, And Near Enough To Sense To Be Quickly Identified And Learned By Name; It Is To These That Words Apply First And Foremost.

The Line That I Am Urging As Today's Conventional Wisdom Is Not A Denial Of Consciousness. It Is Often Called, With More Reason, Arepudiation Of Mind. It Is Indeed A Repudiation Of Mind As A Second Substance, Over And Above Body. It Can Be Described Less Harshly As An Identification Of Mind With Some Of The Faculties, States, And Activities Of The Body. Mental States And Events Are A Special Subclass Of The States And Events Of The Human Or Animal Body.

Theory May Be Deliberate, As In A Chapter On Chemistry, Or It May Be Second Nature, As In The Immemorial Doctrine Of Ordinary Enduring Middle-sized Physical Objects.

Physics Investigates The Essential Nature Of The World, And Biology Describes A Local Bump. Psychology, Human Psychology, Describes A Bump On The Bump.

Language Is A Social Art.

We Must Not Leap To The Fatalistic Conclusion That We Are Stuck With The Conceptual Scheme That We Grew Up In. We Can Change It, Bit By Bit, Plank By Plank, Though Meanwhile There Is Nothing To Carry Us Along But The Evolving Conceptual Scheme Itself. The Philosopher's Task Was Well Compared By Neurath To That Of A Mariner Who Must Rebuild His Ship On The Open Sea.

Just As The Introduction Of The Irrational Numbers ... Is A Convenient Myth [which] Simplifies The Laws Of Arithmetic ... So Physical Objects Are Postulated Entities Which Round Out And Simplify Our Account Of The Flux Of Existence... The Conceptional Scheme Of Physical Objects Is [likewise] A Convenient Myth, Simpler Than The Literal Truth And Yet Containing That Literal Truth As A Scattered Part.

Science Is Not A Substitute For Common Sense, But An Extension Of It.

The Mastery Of One's Phonemes May Be Compared To The Violinist's Mastery Of Fingering. The Violin String Lends Itself To A Continuous Gradation Of Tones, But The Musician Learns The Discrete Intervals At Which To Stop The String In Order To Play The Conventional Notes. We Sound Our Phonemes Like Poor Violinists, Approximating Each Time To A Fancied Norm, And We Receive Our Neighbor's Renderings Indulgently, Mentally Rectifying The More Glaring Inaccuracies.

If There Is A Case For Mental Events And Mental States, It Must Be That The Positing Of Them, Like The Positing Of Molecules, Hassome Indirect Systematic Efficacy In The Development Of Theory.

The Lore Of Our Fathers Is A Fabric Of Sentences. In Our Hands It Develops And Changes, Through More Or Less Arbitrary And Deliberate Revisions And Additions Of Our Own, More Or Less Directly Occasioned By The Continuing Stimulation Of Our Sense Organs. It Is A Pale Gray Lore, Black With Fact And White With Convention. But I Have Found No Substantial Reasons For Concluding That There Are Any Quite Black Threads In It, Or Any White Ones.

Irrefragability, Thy Name Is Mathematics.

We Cannot Stem Linguistic Change, But We Can Drag Our Feet. If Each Of Us Were To Defy Alexander Pope And Be The Last To Lay The Old Aside, It Might Not Be A Better World, But It Would Be A Lovelier Language.

The Variables Of Quantification, 'something,' 'nothing,' 'everything,' Range Over Our Whole Ontology, Whatever It May Be; And We Are Convicted Of A Particular Ontological Presupposition If, And Only If, The Alleged Presuppositum Has To Be Reckoned Among The Entities Over Which Our Variables Range In Order To Render One Of Our Affirmations True.

An Indirect Quotation We Can Usually Expect To Rate Only As Better Or Worse, More Or Less Faithful, And We Cannot Even Hope For Astrict Standard Of More And Less; What Is Involved Is Evaluation, Relative To Special Purposes, Of An Essentially Dramatic Act.

Scientific Method Is The Way To Truth, But It Affords, Even In Principle, No Unique Definition Of Truth. Any So-called Pragmatic Definition Of Truth Is Doomed To Failure Equally.

We Can Applaud The State Lottery As A Public Subsidy Of Intelligence, For It Yields Public Income That Is Calculated To Lighten The Tax Burden Of Us Prudent Abstainers At The Expense Of The Benighted Masses Of Wishful Thinkers.

The Familiar Material Objects May Not Be All That Is Real, But They Are Admirable Examples.

Unlike Descartes, We Own And Use Our Beliefs Of The Moment, Even In The Midst Of Philosophizing, Until By What Is Vaguely Called Scientific Method We Change Them Here And There For The Better. Within Our Own Total Evolving Doctrine, We Can Judge Truth As Earnestly And Absolutely As Can Be, Subject To Correction, But That Goes Without Saying.

The Three Main Medieval Points Of View Regarding Universals Are Designated By Historians As Realism, Conceptualism, And Nominalism. Essentially These Same Three Doctrines Reappear In Twentieth-century Surveys Of The Philosophy Of Mathematics Under The New Names Logicism, Intuitionism, And Formalism.

Life Is Agid, Life Is Fulgid. Life Is What The Least Of Us Make Most Of Us Feel The Least Of Us Make The Most Of. Life Is A Burgeoning, A Quickening Of The Dim Primordial Urge In The Murky Wastes Of Time.

The Word 'definition' Has Come To Have A Dangerously Reassuring Sound, Owing No Doubt To Its Frequent Occurrence In Logical And Mathematical Writings.

Wyman's Overpopulated Universe Is In Many Ways Unlovely. It Offends The Aesthetic Sense Of Us Who Have A Taste For Desert Landscapes.

Necessity Resides In The Way We Talk About Things, Not In The Things We Talk About.

Physical Objects Are Conceptually Imported Into The Situation As Convenient Intermediaries Not By Definition In Terms Of Experience, But Simply As Irreducible Posits Comparable, Epistemologically, To The Gods Of Homer . . . For My Part I Do, Qua Lay Physicist, Believe In Physical Objects And Not In Homer's Gods; And I Consider It A Scientific Error To Believe Otherwise. But In Point Of Epistemological Footing, The Physical Objects And The Gods Differ Only In Degree And Not In Kind. Both Sorts Of Entities Enter Our Conceptions Only As Cultural Posits.

The Totality Of Our So-called Knowledge Or Beliefs, From The Most Casual Matters Of Geography And History To The Profoundest Laws Of Atomic Physics Or Even Of Pure Mathematics And Logic, Is A Man-made Fabric Which Impinges On Experience Only Along The Edges. Or, To Change The Figure, Total Science Is Like A Field Of Force Whose Boundary Conditions Are Experience.

Geography And History

I Have Been Accused Of Denying Consciousness But I Am Not Conscious Of Having Done So.

Meaning Is What Essence Becomes When It Is Divorced From The Object Of Reference And Wedded To The Word.

Transcendentalism

Our Argument Is Not Flatly Circular, But Something Like It. It Has The Form, Figuratively Speaking, Of A Closed Curve In Space.

English General And Singular Terms, Identity, Quantification, And The Whole Bag Of Ontological Tricks May Be Correlated With Elements Of The Native Language In Any Of Various Mutually Incompatible Ways, Each Compatible With All Possible Linguistic Data, And None Preferable To Another Save As Favored By A Rationalization Of The Native Language That Is Simple And Natural To Us.

Native Language

Implication Is Thus The Very Texture Of Our Web Of Belief, And Logic Is The Theory That Traces It.

Uncritical Semantics Is The Myth Of A Museum In Which The Exhibits Are Meanings And The Words Are Labels. To Switch Languages Is To Change The Labels.

Treating 'water' As A Name Of A Single Scattered Object Is Not Intended To Enable Us To Dispense With General Terms And Plurality Of Reference. Scatter Is In Fact An Inconsequential Detail.

It Is Within Science Itself, And Not In Some Prior Philosophy, That Reality Is To Be Identified And Described.

Creatures Inveterately Wrong In Their Inductions Have A Pathetic But Praise-worthy Tendency To Die Before Reproducing Their Kind.

Life Is What The Least Of Us Make The Most Of Us Feel The Least Of Us Make The Most Of.

Some May Find Comfort In Reflecting That The Distinction Between An Eliminative And An Explicative Physicalism Is Unreal.

We Do Not Learn First What To Talk About And Then What To Say About It.

Confusion Of Sign And Object Is Original Sin Coeval With The Word.

Our Acceptance Of An Ontology Is, I Think, Similar In Principle To Our Acceptance Of A Scientific Theory, Say A System Of Physics;we Adopt, At Least Insofar As We Are Reasonable, The Simplest Conceptual Scheme Into Which The Disordered Fragments Of Raw Experience Can Be Fitted And Arranged.

If Pressed To Supplement Tweedledee's Ostensive Definition Of Logic With A Discursive Definition Of The Same Subject, I Would Say That Logic Is The Systematic Study Of The Logical Truths. Pressed Further, I Would Say That A Sentence Is Logically True If All Sentences With Its Grammatical Structure Are True. Pressed Further Still, I Would Say To Read This Book.

To Define An Expression Is, Paradoxically Speaking, To Explain How To Get Along Without It. To Define Is To Eliminate.

It Is One Of The Consolations Of Philosophy That The Benefit Of Showing How To Dispense With A Concept Does Not Hinge On Dispensing With It.

Language Is Conceived In Sin And Science Is Its Redemption.

Nonbeing Must In Some Sense Be, Otherwise What Is It That There Is Not? This Tangled Doctrine Might Be Nicknamed Plato's Beard; Historically It Has Proved Tough, Frequently Dulling The Edge Of Occam's Razor.

To Be Is To Be The Value Of A Variable.

Yields Falsehood When Preceded By Its Quotation.

For Me The Problem Of Induction Is A Problem About The World: A Problem Of How We, As We Are Now (by Our Present Scientific Lights), In A World We Never Made, Should Stand Better Than Random, Or Coin-tossing Chances Changes Of Coming Out Right When We Predict By Inductions. . . .

Logic Is An Old Subject, And Since 1879 It Has Been A Great One.

... Two Men Could Be Just Alike In All Their Dispositions To Verbal Behavior Under All Possible Sensory Stimulations, And Yet Themeanings Or Ideas Expressed In Their Identically Triggered And Identically Sounding Utterances Could Diverge Radically, For The Two Men, In A Wide Range Of Cases.

Set Theory In Sheep's Clothing.

How Are We To Adjudicate Among Rival Ontologies? Certainly The Answer Is Not Provided By The Semantical Formula "to Be Is To Be The Value Of A Variable"; This Formula Serves Rather, Conversely, In Testing The Conformity Of A Given Remark Or Doctrine To A Prior Ontological Standard.

Logic Chases Truth Up The Tree Of Grammar.

Our Talk Of External Things, Our Very Notion Of Things, Is Just A Conceptual Apparatus That Helps Us To Foresee And Control The Triggerings Of Our Sensory Receptors In The Light Of Previous Triggering Of Our Sensory Receptors.

To Call A Posit A Posit Is Not To Patronize It. A Posit Can Be Unavoidable Except At The Cost Of Other No Less Artificial Expedients. Everything To Which We Concede Existence Is A Posit From The Standpoint Of A Description Of The Theory-building Process, And Simultaneously Real From The Standpoint Of The Theory That Is Being Built.

The Scientist Is Indistinguishable From The Common Man In His Sense Of Evidence, Except That The Scientist Is More Careful.

One Man's Antinomy Is Another Man's Falsidical Paradox, Give Or Take A Couple Of Thousand Years.

Some Have Said That The Thesis [of Indeterminacy] Is A Consequence Of My Behaviorism. Some Have Said That It Is A Reductio Ad Absurdum Of My Behaviorism. I Disagree With This Second Point, But I Agree With The First. I Hold Further That The Behaviorism Approach Is Mandatory. In Psychology One May Or May Not Be A Behaviorist, But In Linguistics One Has No Choice.

My Position Is A Naturalistic One; I See Philosophy Not As An A Priori Propaedeutic Or Groundwork For Science, But As Continuous With Science. I See Philosophy And Science As In The Same Boat--a Boat Which, To Revert To Neurath's Figure As I So Often Do, We Can Rebuild Only At Sea While Staying Afloat In It. There Is No External Vantage Point, No First Philosophy.

Different Persons Growing Up In The Same Language Are Like Different Bushes Trimmed And Trained To Take The Shape Of Identical Elephants. The Anatomical Details Of Twigs And Branches Will Fulfill The Elephantine Form Differently From Bush To Bush, But The Overall Outward Results Are Alike.

Students Of The Heavens Are Separable Into Astronomers And Astrologers As Readily As The Minor Domestic Ruminants Into Sheep And Goats, But The Separation Of Philosophers Into Sages And Cranks Seems To Be More Sensitive To Frames Of Reference.

One Man's Observation Is Another Man's Closed Book Or Flight Of Fancy.

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