§3 Knowledge vs. Mere True Belief

In the journey of a Reasonable Person, the goal is not just to happen upon the truth, but to possess Knowledge. Philosophically, knowledge is more than just a lucky guess. If you bet on a horse because you liked its name and it wins, you had a “true belief” that it would win, but you didn’t know it would. This section explores the rigorous criteria that separate genuine knowledge from accidental accuracy.

3.1 The Tripartite Definition: Justified True Belief (JTB)

Since the time of Plato, the standard “tripartite” (three-part) definition of knowledge has served as the baseline for epistemology. To claim you know a proposition ($P$), three conditions must be met simultaneously:

1. The Belief Condition: You must actually accept $P$. You cannot “know” that the sun is a star if you don’t actually believe it.

2. The Truth Condition: $P$ must be true. You cannot “know” something that is false. You might think you know it, but you are simply mistaken.

3. The Justification Condition: You must have a “good reason” or sufficient evidence for believing $P$. This prevents lucky guesses from being counted as knowledge.

3.2 The Gettier Revolution: When JTB Fails

For centuries, JTB was the gold standard. However, in 1963, Edmund Gettier published a famous three-page paper that proved JTB is necessary but not sufficient for knowledge. He provided scenarios where a person has a justified true belief, but it still feels like they don’t “know” the fact because the truth was reached through a fluke.

• The “Smith and Jones” Case: Smith is told by the company president that Jones will get the promotion. Smith also counts 10 coins in Jones’s pocket. Smith concludes: “The man who gets the promotion will have 10 coins in his pocket.”

  • The Twist: Smith actually gets the promotion (not Jones), and Smith also happens to have exactly 10 coins in his pocket.

  • The Result: Smith’s belief was True and Justified (the president told him), but it wasn’t Knowledge because his justification was tied to the wrong person.

3.3 Post-Gettier: Internalism vs. Externalism

The “Gettier Problems” forced philosophers to rethink how we “link” our minds to the truth. This created a divide in how we define the “Justification” pillar:

• Internalism: The view that justification depends entirely on factors internal to the person’s mind. To “know” something, you must be able to reflect on your reasons and explain why you believe it. If you can’t point to the evidence, you don’t have knowledge.

• Externalism (Reliabilism): The view that justification depends on external factors—specifically, whether your belief was produced by a reliable process. If your eyes are working perfectly and you see a tree, you “know” it’s a tree even if you can’t explain the neurobiology of vision. The “link” is the reliability of the sense organ itself.

3.4 Standpoint Theory and “Knowing From Somewhere”

Modern epistemology adds a final layer: Standpoint Theory. This suggests that knowledge is never “neutral” or from a “God’s eye view.”

• Situated Knowledge: Every “knower” exists in a specific social and historical context.

• The Insight: Marginalized groups often possess a unique “standpoint” because they must understand the dominant culture’s perspective to survive, while also understanding their own lived reality. This “double consciousness” can lead to a deeper, more justified knowledge of how social systems actually function compared to those in positions of power who may suffer from “epistemic blind spots.”

§3 Summary: The Hierarchy of Belief