Card 2.3.2 · Root II — Epistemology
Internalism vs Externalism
Do you have to know why you know?
This node asks whether a knower must have access to what justifies their belief, or whether justification can depend on facts they cannot see.
Where it sits
Under 2.3 Structure of justification. Borders 2.1, 2.2.4, 6.14.
The rival answers
| Position | Claim |
|---|---|
| Access internalism | The justifier must be available to reflection |
| Mentalist internalism | Justification supervenes on mental states, accessible or not |
| Process reliabilism | What matters is that the belief-forming process is reliable |
| Proper functionalism | Justification requires faculties working as designed in a suitable environment |
| Virtue externalism | Credit to the knower's competence, whether or not they can articulate it |
Key figures
| Figure | Dates | Tradition | Contribution |
|---|---|---|---|
| Alvin Goldman | 1938–2024 | Analytic | Process reliabilism |
| Laurence BonJour | b. 1943 | Analytic | The clairvoyant counterexample |
| Alvin Plantinga | b. 1932 | Analytic | Proper function |
| Ernest Sosa | b. 1940 | Analytic | Virtue-theoretic middle ground |
Connections
→ 2.3, 2.1 · ↔ 2.2.4, 2.1.1, 6.17 · ◇ reliabilism, access internalism, proper functionalism, virtue epistemology · ○ Modern; Table 3
→ narrower questions · ↔ questions it borders · ◇ the positions, mapped in Part III of the book · ○ the eras and comparison tables (Parts IV and V)
The full card is in the book
In The Coordinates of Thought this card goes on to a worked example that sets the answers against one case, and to where the question touches daily life — page 109.
On Coordinates of Thought
Conversations about this question in Knowledge & belief:
- Knowledge-first epistemology is surrender dressed up as a theory 6 replies
- My father knew which cedar beam would split. He could never say how. Did he know? 6 replies
- Nāgārjuna asked what proves the means of knowledge. Is that Agrippa’s trilemma in Sanskrit? 6 replies
- Reliabilism has a machine problem: reliable prediction is not knowledge 6 replies
- I know within ten seconds whether a room will laugh, but I can’t say how. Does that count as knowing? 5 replies