SHORT PHILOSOPHICAL ADVENTURE BASED ON PLATO'S THEAETETUS
Athens, 399 BCE. The great philosopher Socrates walks through the agora, his mind troubled by a seemingly simple question: What is knowledge?
As you approach the great thinker, he turns to you with curious eyes.
You nod, eager to engage with the famous philosopher.
Socrates listens attentively, nodding as you list various fields of knowledge. When you finish, he strokes his beard thoughtfully.
Socrates points out that giving examples of knowledge doesn't tell us what knowledge itself is. Examples illustrate cases of knowledge but don't define the concept. This is a fundamental distinction between illustrating a concept through instances and defining the concept itself.
This is like someone asking "What is technology?" and you responding "Smartphones, computers, and electric cars." You've listed examples of technology but haven't defined what makes something technology. The examples don't tell us the essential characteristics that make these items technological in nature.
Similarly, if a doctor asked what disease is, and you replied "cancer, diabetes, and COVID-19," you would be giving examples of diseases without explaining what makes something a disease in the first place.
Socrates' eyes light up, and he nods enthusiastically.
After discussing this further, Socrates begins to look troubled.
You nod in agreement.
Socrates demonstrates that perception alone isn't sufficient for knowledge. When we hear someone speaking a language we don't understand, we perceive the sounds perfectly well, but we don't know what they mean. Therefore, perception cannot be equated with knowledge.
Imagine you're watching a technical presentation about quantum physics. You perceive all the words the physicist says, you see all the equations on the slides, but if you haven't studied quantum physics, you don't know what any of it means. You've perceived everything, yet gained no knowledge.
Similarly, if you visit a website written in a language you don't speak, you perceive all the characters on the screen, but you don't know the content. This shows that perception alone is insufficient for knowledge.
Socrates points out that we can know things we currently don't perceive. If knowledge were perception, we could only know what we're currently perceiving. Yet we clearly know many things through memory that we aren't currently perceiving.
You know your home address, your parents' names, and what you did last weekend—none of which you are perceiving right now. If knowledge were limited to immediate perception, most of what we consider knowledge would disappear whenever we stopped directly perceiving it.
Think about a password you use regularly. You know it even when you're not looking at it or typing it. This knowledge persists independent of perception.
Socrates considers this thoughtfully.
Socrates ponders for a moment before continuing.
Socrates argues that the jury has a true belief (the defendant is innocent), but they lack knowledge because their belief comes from persuasion rather than direct evidence. They were convinced by the lawyer's rhetoric, not by understanding the facts themselves. This shows that true belief can exist without knowledge.
Imagine you correctly guess the answer to a complex math problem without understanding the mathematical principles involved. You have a true belief about the answer, but no genuine knowledge of mathematics.
Or consider someone who believes a scientific fact (like "black holes emit radiation") because a celebrity they trust mentioned it, not because they understand the science. Their belief is true, but it's not knowledge—it's just lucky acceptance of correct information. If asked to explain or defend the belief, they couldn't do so.
Socrates raises philosophical difficulties about false belief. If knowledge is true belief, we need to explain how false belief is possible. But defining false belief proves challenging—is it believing what doesn't exist? Is it mistaking one thing for another? Each explanation faces problems.
This philosophical puzzle has modern parallels in discussions about misinformation. When someone believes fake news, what exactly is happening? They believe something that isn't true, but the content of their belief exists as a proposition even if it doesn't correspond to reality.
Consider someone who believes "The Earth is flat." They aren't believing nothing (which would be impossible); they're believing a proposition that doesn't correspond to reality. This illustrates the complexity of how beliefs relate to truth and existence.
Socrates nods approvingly.
Socrates considers several possibilities.
Socrates argues that if "account" simply means putting one's belief into words, this doesn't add anything meaningful to true belief. Anyone capable of speech could transform their true beliefs into knowledge just by expressing them, which doesn't seem right.
This is like claiming you "know" something simply because you can say it out loud. If you make a lucky guess that "Barcelona is the capital of Catalonia" and then simply state this belief verbally, you haven't transformed your lucky guess into knowledge merely by expressing it in words.
In modern terms, this would mean that merely tweeting or posting a correct fact would constitute knowledge, even if you had no understanding of why that fact is true.
Socrates shows that if "account" means listing the basic elements of something, we face a paradox: How can we know a complex thing by listing its elements if we don't already know the elements themselves? And if the elements are "unknowable," how can listing unknowable things create knowledge?
This is like claiming you know how a smartphone works because you can list its components (battery, processor, screen, etc.) without understanding how those components function or interact. Simply naming parts doesn't constitute knowledge of the whole.
Similarly, listing the ingredients in a medicine doesn't mean you know how the medicine works in the body. True knowledge requires understanding the relationships and functions, not just identifying components.
Socrates argues that if "account" means stating what distinguishes something from everything else, we face a circularity: To identify the distinguishing feature of something, you must already know how it differs from other things—which presupposes the very knowledge you're trying to define.
This is like saying you know what makes a particular programming language unique, but to identify its unique features, you'd first need to understand programming languages well enough to compare them. The knowledge precedes the account, rather than being constituted by it.
Or consider trying to explain what makes your friend unique among all people. To do this, you'd already need to know your friend well—the account depends on prior knowledge rather than creating it.
The sun begins to set over Athens. Socrates must leave for his appointment at the King's Porch—the beginning of his trial.
While Socrates never arrived at a definitive answer to "What is knowledge?", his explorations laid the foundation for epistemology—the study of knowledge—that continues to this day.
Philosophers after Plato would continue developing theories of knowledge, with many accepting some version of "justified true belief" as the starting point, while acknowledging the complexities Socrates identified.
This interactive map shows how Socrates' inquiries in the Theaetetus connect to modern epistemological problems and concepts. Click on any node to explore connections.
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Select a node in the network to view detailed information about that epistemological concept and its connections.
BASED ON PLATO'S DIALOGUE "THEAETETUS" (c. 369 BCE)
MADE BY MERT SEVEN FOR COMMUNICATION RESEARCH AND ETHICS COURSE