Questions: Memorial Justification and Preservation of Knowledge

Question 1

A philosopher argues: 'You are only justified in believing that the Battle of Hastings was fought in 1066 if you can currently recall your original source for that belief.' A memorial justification theorist would say this is wrong. Why?

• A. Historical facts are self-justifying and need no epistemic grounding
• B. Memorial justification holds that past justification is preserved through memory even when the original reasons are no longer accessible — what matters is that the belief was well-grounded when acquired and that memory has reliably retained it, not that the believer can presently recall their source
• C. The philosopher is correct — you cannot be justified without present access to justifying reasons
• D. The source is irrelevant; any belief retained in memory is automatically justified

Answer: (B)

The philosopher's view would make ordinary knowledge impossible — we almost never retain our original sources for the thousands of facts we hold. The memorial justification account says the justificatory status of a belief can travel through time via reliable memory. What matters is (1) the belief was justified when acquired and (2) memory has preserved it reliably without defeating interference. Present access to original reasons is not required.

Question 2

Under what conditions does memorial justification fail — when does remembering something not justify believing it?

• A. Whenever more than ten years have passed since the belief was originally acquired
• B. Whenever you cannot explain the belief to someone else in sufficient detail
• C. When your memory is systematically unreliable in the relevant domain, or when you encounter defeating evidence — such as new information that your original source was wrong, or that your memory tends to distort this type of fact — which overrides the default justification memory provides
• D. Memorial justification never fails once a belief has been justified

Answer: (C)

Memorial justification is defeasible — it holds by default but can be overridden by undermining or rebutting evidence. The key defeating conditions are: (1) evidence that the memory process itself is unreliable in this domain, (2) evidence that the original justification was flawed, or (3) new information that directly contradicts the remembered belief. This defeasibility is what keeps memorial justification epistemically responsible — it is not a blank check for believing anything one remembers.

Question 3

For memorial justification to work, you should have a 'meta-memory' — you should remember the fact that you originally had good reasons for the belief.

• T. True
• F. False

Answer: False

Memorial justification is a first-order phenomenon: the belief itself needs to have been justified when acquired, and memory needs to reliably preserve it. You do not need to remember *that* you had reasons, nor recall what those reasons were. A meta-memory requirement — knowing that you once knew something — would make most ordinary knowledge unjustified, since we rarely retain records of our original justificatory process. The preserved justification works regardless of whether you have any meta-cognitive access to it.

Question 4

Memorial justification shows that justification is not purely a present-tense phenomenon — the epistemic status of a current belief can be partly constituted by its past justificatory history.

• T. True
• F. False

Answer: True

This is the central theoretical contribution of memorial justification. Many of our current beliefs are justified not because we presently have access to supporting evidence, but because they were well-grounded when acquired and have been reliably carried forward by memory. The justification is, in a sense, diachronic — it exists across time. This shows that 'S is currently justified in believing P' does not require 'S currently has access to justifying evidence for P.'

Question 5

Why would daily epistemic life be impossible if memorial justification required present access to original justifying reasons for every memory-based belief?

Model answer: Most of what we know — historical facts, scientific results, mathematical truths, practical knowledge about how the world works — is retained in memory without any trace of the reasoning or evidence that originally justified it. If every memory-based belief required present access to its original justification, we would need to re-derive or re-verify virtually everything before each use. This would be practically impossible and would leave us unable to act on most of our knowledge. Memory's conserving function — its ability to carry justification forward through time without requiring the believer to 'keep the receipts' — is what makes the accumulation and use of knowledge across a human lifetime possible.

This argument from practical necessity also has a deeper philosophical point: it reveals that the requirement to always possess concurrent justification is not a plausible model of human knowledge. Knowledge is temporally extended; we build on what we learned before, and the epistemic system has to be designed to allow this. Memorial justification describes how the system actually works.