Philosophy of language investigates fundamental questions about how language relates to reality: What do words refer to? How do sentences acquire meaning? How do we communicate thoughts through utterances? What is the relationship between language and truth?
Begin by identifying the central puzzle: why is meaning more than reference? Study the morning star / evening star case and consider what makes two names with the same referent differ in meaning.
Language is just a naming system where words directly stand for objects. Meaning is identical to reference. The study of language is merely about words, not about the fundamental nature of reality and thought.
The simplest possible theory of language is a naming picture: words are labels, and meaning is the thing the label is attached to. This picture works reasonably well for proper names ("London" names a city) and for pointing at objects in front of you. But it breaks down almost immediately when you examine language more carefully, and the breakdowns reveal deep questions about the relationship between language, thought, and reality.
Consider the morning star / evening star puzzle — your recommended starting case. "Hesperus" and "Phosphorus" are both names for Venus. On the naming picture, their meaning just *is* Venus. But then "Hesperus is Phosphorus" would mean the same as "Hesperus is Hesperus" — a trivial identity. Yet "Hesperus is Phosphorus" is an astronomical discovery, not a logical tautology. Something about the *way* these names present their referent differs, even though the referent is the same. This is the puzzle that motivated Frege to distinguish sense (mode of presentation, cognitive significance) from reference (the object denoted). Meaning cannot simply be reference, because two expressions can refer to the same thing while differing in meaning.
A second breakdown: what about terms that *don't* refer? "Sherlock Holmes is a detective" seems perfectly meaningful, but Holmes doesn't exist. If meaning were just reference, sentences about Holmes would be meaningless or defective. Yet we understand them, reason about them, and debate their truth. This motivates theories that separate the content a term contributes to a sentence from whether that content successfully picks out a real object. Similarly, general terms like "red" or "tiger" don't name a single individual — they apply to many things. What determines which things they apply to? This is the question of extension (the set of things a term applies to) and intension (the property or criterion that determines extension).
Philosophy of language is not an isolated specialty. It bears directly on metaphysics (do abstract objects like numbers and properties exist, given that we refer to them?), epistemology (how does language convey knowledge?), and the philosophy of mind (what is the relationship between linguistic meaning and mental content?). The central questions — What is reference? What is meaning? How do context and speaker intention interact with semantic content? — are foundational for everything that follows in this course.
Topics in reflective domains aren't scored by quiz answers. Read, reflect, and mark when you've thought it through.
This is a foundational topic with no prerequisites.
No prerequisites — this is a starting point.