Philosophy of Language Skill

Master the philosophical study of language: How do words mean? How does reference work? What is truth?

Core Questions

Question	Issue
How do words mean?	Theory of meaning
How do names refer?	Reference theory
What is truth?	Truth theories
What do we do with words?	Speech act theory

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Theories of Meaning

Frege: Sense and Reference

FREGEAN SEMANTICS
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REFERENCE (Bedeutung)
├── What expression picks out
├── "Venus" refers to Venus
└── Compositional: Reference of whole from parts

SENSE (Sinn)
├── Mode of presentation
├── Cognitive significance
├── "Morning star" vs. "Evening star"
└── Same reference, different sense

WHY BOTH?
├── "Hesperus = Phosphorus" is informative
├── "Hesperus = Hesperus" is trivial
├── Same reference, different sense
└── Sense determines reference

Russell: Descriptions

The Problem: "The present King of France is bald"

• No King of France exists
• What does the sentence mean?

Russell's Analysis:

"The F is G" =
∃x(Fx ∧ ∀y(Fy → y=x) ∧ Gx)

"There is exactly one F, and it is G"

Not a referring expression but a quantified claim
False (not meaningless) because no unique F exists

Direct Reference

Kripke's Revolution:

• Names are rigid designators
• Refer to same thing in all possible worlds
• Not abbreviated descriptions

KRIPKE'S ARGUMENTS
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MODAL ARGUMENT:
"Aristotle might not have been a philosopher"
├── Makes sense
├── But "The teacher of Alexander might not have taught Alexander"
│   └── Would make Aristotle not Aristotle
└── Names ≠ descriptions

EPISTEMIC ARGUMENT:
We can discover "Hesperus = Phosphorus"
├── A posteriori necessary truth
├── Same thing in all worlds
└── But discovered, not known a priori

SEMANTIC ARGUMENT:
Reference is causal-historical
├── Not by fitting description
├── Baptism + chain of communication
└── Name-using practice

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Meaning and Use

Wittgenstein: Meaning as Use

Early: Meaning is picturing reality Later: "Meaning is use in a language game"

Language Games:

• Meaning depends on context, rules, practice
• No single essence to "meaning"
• Family resemblance

Private Language Argument:

• No purely private meanings
• Rule-following requires community
• Meaning is public

Speech Act Theory (Austin, Searle)

SPEECH ACT THEORY
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THREE TYPES OF ACTS:

LOCUTIONARY
├── Saying something with meaning
└── Uttering words with sense and reference

ILLOCUTIONARY
├── What you do in saying it
├── Promising, warning, asserting
└── Force of the utterance

PERLOCUTIONARY
├── Effect on hearer
├── Persuading, frightening, amusing
└── Consequences of saying

FELICITY CONDITIONS:
├── Preparatory: Appropriate circumstances
├── Sincerity: Speaker means it
├── Essential: Counts as the act
└── Infelicity: Act fails (not false, but unhappy)

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Reference and Names

Descriptivist Theory

Frege/Russell: Names = disguised descriptions

• "Aristotle" = "The teacher of Alexander" (or cluster)
• Reference determined by satisfying description

Problems (Kripke):

• Modal: Could have failed to satisfy description
• Epistemic: Can discover identity
• Semantic: Reference even with false beliefs

Causal-Historical Theory

Kripke/Putnam:

• Initial baptism fixes reference
• Reference transmitted through causal chain
• Community-based reference

Natural Kind Terms

Putnam's Twin Earth:

TWIN EARTH
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Scenario:
├── Twin Earth exactly like Earth
├── Except "water" is XYZ, not H₂O
├── XYZ phenomenally identical to H₂O
└── 1750: No one knows difference

Question: Does "water" mean the same?

Putnam: No!
├── "Water" on Earth refers to H₂O
├── "Water" on Twin Earth refers to XYZ
├── "Meanings ain't in the head"
└── Natural kind terms refer to natural kinds

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Truth

Correspondence Theory

• Truth = correspondence to facts
• "Snow is white" is true iff snow is white
• Problems: What are facts? What is correspondence?

Coherence Theory

• Truth = coherence with other beliefs
• System of beliefs that hangs together
• Problems: Coherent fictions?

Pragmatic Theory

• Truth = what works
• Useful beliefs are true
• Problems: Useful ≠ true

Deflationism

• "True" is just a device for endorsement
• "Snow is white" is true = Snow is white
• No substantial property

Tarski's Semantic Theory

TARSKIAN TRUTH
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T-SCHEMA:
"S" is true iff S

EXAMPLE:
"Snow is white" is true iff snow is white

Requirements:
├── Object language (mentioned)
├── Metalanguage (used)
├── Hierarchy avoids liar paradox
└── Truth defined for formal languages

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Context and Indexicals

Indexicals

• "I", "here", "now", "this"
• Reference depends on context of utterance
• Kaplan: Character vs. Content

KAPLAN'S THEORY
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CHARACTER
├── Rule for determining reference
├── "I" = speaker of context
└── Constant across contexts

CONTENT
├── What's said in context
├── "I am tired" said by me
└── Proposition about me

Contextualism

• Meaning of many expressions context-dependent
• Not just indexicals
• "Knows", "tall", "ready"

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Key Vocabulary

Term	Meaning
Sense	Mode of presentation
Reference	What expression picks out
Rigid designator	Same reference in all worlds
Indexical	Context-dependent expression
Proposition	What is said, content
Speech act	Action performed in speaking
Illocutionary force	Type of speech act
Compositionality	Meaning of whole from parts
Use theory	Meaning is use
Direct reference	Names refer without sense

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Integration with Repository

Related Skills

• analytic-philosophy: Core tradition
• logic: Formal semantics

Related Themes

• thoughts/knowledge/: Language and thought