Philosophy · Year 12 · Epistemology: The Nature and Sources of Knowledge · 1.º Período

The Tripartite View of Knowledge

Students examine the traditional definition of knowledge as justified true belief. They will evaluate Gettier cases that challenge the sufficiency of this definition.

TL;DR:The Tripartite View of Knowledge is a cornerstone of the AQA Epistemology module, establishing the traditional definition of propositional knowledge as Justified True Belief (JTB). Students explore the three conditions (truth, belief, and justification) and evaluate whether they are individually necessary and jointly sufficient. This topic introduces the rigorous analytical style required for Year 12 Philosophy, moving beyond personal opinion toward formal logical definitions.

• National Curriculum Attainment Targets
• AQA 7172: Epistemology 3.1.1.1
• AQA 7172: Epistemology 3.1.1.2

About This Topic

The Tripartite View of Knowledge is a cornerstone of the AQA Epistemology module, establishing the traditional definition of propositional knowledge as Justified True Belief (JTB). Students explore the three conditions (truth, belief, and justification) and evaluate whether they are individually necessary and jointly sufficient. This topic introduces the rigorous analytical style required for Year 12 Philosophy, moving beyond personal opinion toward formal logical definitions.

The unit shifts focus when students encounter Edmund Gettier's 1963 paper, which provides counterexamples where JTB exists without what we would intuitively call knowledge. These 'Gettier cases' force students to consider whether the definition needs a fourth condition or a complete overhaul. This topic comes alive when students can physically model the logic of Gettier cases through role play and peer explanation.

Key Questions

1. What are the necessary and sufficient conditions for knowledge?
2. Does a justified true belief guarantee knowledge?
3. How do Gettier cases undermine the tripartite view?

Watch Out for These Misconceptions

Common Misconception

Students often believe that 'justification' must mean 'absolute proof'.

What to Teach Instead

In the tripartite view, justification refers to having good reasons or evidence, not necessarily being 100% certain. Peer discussion helps students see that we often have justified beliefs that turn out to be false, which is the basis of the Gettier problem.

Common Misconception

Students think Gettier cases prove that truth is not necessary for knowledge.

What to Teach Instead

Gettier cases actually rely on the belief being true; they show that truth and justification can coincide by luck. Using active modeling helps students track how the 'truth' element is satisfied by accident rather than by the justification provided.

Active Learning Ideas

Role Play

The Smith and Jones Case

In pairs, students act out the famous Gettier scenario involving the ten coins and the job promotion. One student plays the 'knower' while the other identifies exactly where the justification and truth come apart, despite the belief being correct.

20 min·Pairs

Inquiry Circle

The Fourth Condition

Small groups are assigned a potential fix for JTB, such as 'No False Lemmas' or 'Infallibilism'. They must create a poster explaining their fix and then rotate to find a flaw in another group's proposed solution.

40 min·Small Groups

Think-Pair-Share

Necessary vs Sufficient

Students brainstorm non-philosophical examples of necessary and sufficient conditions (e.g., having four sides for a square). They then apply this logic to the JTB conditions to see if any can be removed without losing the definition of knowledge.

15 min·Pairs

Frequently Asked Questions

What is a 'false lemma' in epistemology?

A lemma is a premise or an intermediate step in an argument. A 'false lemma' is a false belief that a person uses to reach a conclusion. In the context of JTB, some philosophers argue that for a belief to count as knowledge, it must not be based on any false lemmas.

Why is the tripartite view still taught if Gettier disproved it?

The tripartite view remains the benchmark for defining knowledge. Even though Gettier cases challenge its sufficiency, the three conditions of truth, belief, and justification are still widely considered necessary. It provides the essential framework for all modern epistemological debate.

How can active learning help students understand the Tripartite View?

Active learning helps students navigate the complex logic of Gettier cases. By using role plays or collaborative problem-solving, students can 'see' the gap between a justified belief and the actual truth. This hands-on approach makes the abstract concept of a 'false lemma' much more concrete and easier to critique during exams.

Is JTB the same as certainty?

No, JTB and certainty are different. JTB is an account of what knowledge is, while certainty is a psychological state or a very high standard of justification. One can have a justified true belief without feeling 100% certain, and one can feel certain about something that is false.