Semantics - Theories of Meaning

Theories of Meaning Introduction When we use language, words and sentences carry meaning—but what exactly is meaning? This question has puzzled philosophers for centuries, and there's no single agreed-upon answer. Instead, philosophers have developed several competing theories, each explaining meaning in different ways. These theories help us understand how language connects to the world, to our thoughts, and to each other. In this section, we'll explore the major theories of meaning that appear in philosophy of language and semantics courses. Understanding these theories—and how they differ—is essential for grasping modern discussions about language and communication. Referential Theories of Meaning Referential theories propose that the meaning of an expression is simply the object or entity to which it refers. Under this view, understanding a word means knowing what thing it points to. For instance, the word "George Washington" refers to a particular historical person. According to referential theory, the meaning of that name is that person. Similarly, general terms like "cat" refer to the set of all cats, so the meaning of "cat" is that entire set of feline creatures. This approach seems intuitive at first. After all, when someone teaches a child what "apple" means, they often point at an apple. The word and the fruit are directly linked. Problems for Referential Theories However, referential theories face serious difficulties. Consider the name Pegasus—the mythical winged horse from Greek mythology. Pegasus has a clear meaning; we can use it in sentences, understand stories about it, and even distinguish it from other creatures. Yet Pegasus doesn't actually exist, so it has no real referent to point to. This creates a puzzle: if meaning comes from reference, how can "Pegasus" be meaningful when there's nothing it refers to? Another problem involves context-dependent expressions like "here," "now," or "I." The word "here" means something different depending on where it's uttered. If meaning were simply the referent, then "here" would have to be the same object every time it's used—but it clearly refers to different locations in different contexts. This suggests that meaning involves something more than just static reference. These problems don't eliminate referential theories entirely, but they show that meaning can't be only about reference. Ideational (Mentalist) Theories Ideational theories shift our focus from the external world to the internal mind. They propose that the meaning of an expression is the mental state or idea associated with it in speakers' minds. The philosopher John Locke developed an early version of this view. Locke argued that a word's meaning is the idea (mental representation) that people have in their minds when they think about the word's referent. So "apple" means whatever idea of an apple you have in your head when you think about fruit. Grice's Intention-Based Approach A more sophisticated mentalist theory comes from philosopher H.P. Grice. Grice proposed that what makes an utterance meaningful is the speaker's intention. Specifically, a speaker means something by an utterance if they intend to produce a particular reaction in their audience. For example, if I say "It's cold in here" intending you to close the window, my utterance has the meaning it does because of my communicative intention. The appeal of mentalist theories is clear: they acknowledge that language is something we do with our minds, not just abstract connections between words and objects. However, mentalist theories face the challenge of explaining what makes certain mental states count as meaning. Are thoughts private? How do we verify what others are thinking? Causal Theories of Meaning Causal theories take a different approach entirely. They hold that the meaning of an expression depends on the causal history—the chain of causes and effects—connecting that expression to the world. The Core Idea Rather than asking "What does this word refer to?" or "What's in the speaker's mind?", causal theories ask: "How did this word come to be used this way? What caused its current usage?" The intuition is that meaning is established and maintained through causal connections. A word gets its meaning through a chain of communicative events stretching back into history. When I learn the word "dog" from my parents, I participate in a causal chain that ultimately traces back to the original uses of that word in my linguistic community. Behaviorist Semantics One important version of causal theory is behaviorist semantics, which defines meaning entirely in terms of observable behavior and stimulus-response patterns. In behaviorist semantics, we don't need to appeal to hidden mental states or mysterious references. Instead, meaning is given by the situations that prompt speakers to produce utterances and the responses those utterances provoke in listeners. For example: Stimulus: A dog appears Response: A speaker says "dog" Audience response: A listener looks at the dog Behaviorists argue this approach has a major advantage: it's based on publicly observable, measurable phenomena rather than private mental states we can't directly access. Language learning, from this perspective, is simply the process of acquiring stimulus-response pairs through experience and habit. The motivation is philosophically significant—behaviorists wanted to develop a theory of meaning grounded in objective, scientific observation rather than subjective introspection. The Causal Theory of Proper Names Philosopher Saul Kripke developed an influential version of causal theory specifically for proper names. Kripke's causal theory of names works as follows: Naming event (baptism): At some point in history, a name is introduced and connected to a particular person or object. This "baptism" establishes the initial link. For instance, when a child is born and named "Alice," that naming event establishes "Alice" as a name for that particular person. Causal chain: Every subsequent use of the name is causally connected back to that original baptism. When I use "Alice" today, my use is meaningful because it stands in a causal chain tracing back to Alice's original naming. Meaning through history: The meaning of the name isn't determined by my current beliefs or mental associations with Alice. Rather, the name means what it does because of that historical causal chain. This theory elegantly solves the Pegasus problem in a way referential theories couldn't. Even if a name's referent ceases to exist—say, if all historical records of "George Washington" were lost—the name could still be meaningful because it maintains its meaning through the causal chain in the linguistic community. Truth-Conditional Semantics Truth-conditional semantics takes yet another approach. It defines the meaning of a sentence by specifying the conditions under which that sentence would be true. The Basic Idea Under this view, to understand a sentence is to know what the world must be like for the sentence to be true. For instance: The sentence "It is raining" is true if and only if water is falling from clouds in the vicinity. The sentence "The Eiffel Tower is in France" is true if and only if that tower is located in the country of France. The meaning of these sentences consists precisely in these truth conditions. You understand the sentence when you know what facts in the world would make it true. Possible Worlds and Intension Truth conditions can be formalized using the concept of possible worlds. A sentence is true in some possible worlds (where its conditions hold) and false in others (where they don't). The extension of a sentence is its truth value in the actual world (true or false). The intension of a sentence is the set of all possible worlds in which it would be true. For example, "The President of the United States is male" is true in the actual world (extension = true), but its intension includes all possible worlds where the U.S. President happens to be male, and excludes worlds where the President is female. Verificationist Meaning Verificationism refines truth-conditional semantics by adding that meaningful sentences must have a method of verification. A sentence is meaningful not just if it has truth conditions, but if those conditions can actually be confirmed or falsified through observation. Under verificationism: Scientific claims like "This element is radioactive" are meaningful because we can design experiments to verify or falsify them. Claims that cannot possibly be verified or falsified are meaningless. For instance, "There are unobservable spirits that leave no traces in the observable world" cannot be confirmed or denied, so verificationists consider it meaningless. This approach combines truth conditions with epistemic considerations—meaning is tied not just to what would make a sentence true, but to what we can know or test. Use Theory and Inferentialist Semantics Use Theory of Meaning Use theory proposes that meaning is determined by how an expression is actually used in linguistic practice. The meaning of a word just is the way speakers use it. Philosopher Ludwig Wittgenstein introduced the foundational idea behind use theory through his concept of language games. Wittgenstein argued that language isn't a single monolithic system, but rather a collection of different games, each with different rules. In the game of chess, a "bishop" has specific rules and moves. In a religious context, "bishop" means something quite different. The meaning of an expression emerges from its role within its particular language game. Different versions of use theory emphasize different aspects: Some versions identify meaning directly with regular patterns of use—how speakers actually deploy the word. Other versions incorporate social norms and conventions, asking whether a use is considered appropriate or acceptable within a given speech community. Your use of "hello" as a greeting is meaningful partly because your community has conventions about when and how to greet people. Inferentialist Semantics Inferentialist semantics (also called conceptual role semantics) defines meaning through logical relationships rather than behavioral patterns. Under this theory, the meaning of an expression consists of its inferential role—what inferences you can make from it and what inferences can lead to it. For example, the meaning of "bachelor" is partly constituted by the fact that: From "John is a bachelor," you can infer "John is unmarried" and "John is male" To conclude "John is a bachelor," certain inferences (like "John is not married") would need to support it The full meaning of "bachelor" is the complete network of valid inferences it participates in. Distinction from Use Theory The key difference between use theory and inferentialist semantics is their focus: Use theory focuses on observable linguistic practices—what people actually do with words Inferentialist semantics focuses on logical relationships—the valid inferences between expressions You might use a word in a particular way (use theory), but your use participates in a broader inferential structure (inferentialist semantics). These theories can work together, but they emphasize different aspects of meaning. Social-Normative Aspects of Meaning Across all these theories, an important thread emerges: social norms shape what counts as meaningful. This perspective reminds us that language is fundamentally a social phenomenon. Language communities establish norms about how expressions should be used and interpreted. These norms include: Conventions about proper usage (e.g., we say "How are you?" as a greeting, not as a literal question about your health) Standards for what counts as correct or appropriate meaning in context Expectations that guide both production and comprehension of utterances When you learn a language, you're not just learning abstract rules—you're learning to participate in a community's normative practices. A word means what it does partly because speakers in your community expect and enforce certain uses. This social dimension appears in causal theories (meaning is sustained by community practice), use theories (meaning comes from communal patterns), and inferentialist approaches (inferences are valid within a community's conceptual framework). <extrainfo> Comparing the Theories It's helpful to see how these theories relate to each other: Referential theories ground meaning in the external world Ideational theories ground meaning in the mind Causal theories ground meaning in history and causation Truth-conditional theories ground meaning in conditions for truth Use and inferentialist theories ground meaning in linguistic practice and logical relations These aren't necessarily contradictory. Some philosophers propose hybrid views that combine elements from multiple theories. For instance, a meaning might be partly about reference, partly about truth conditions, and partly about communal use patterns. </extrainfo>