# Knowledge and evidence: follow a reason to its source — Study worksheet [Study guides](https://unireadinglist.com/guides/knowledge-and-evidence/) [Course topic: Epistemology](https://unireadinglist.com/subjects/philosophy/#course-epistemology) Sources checked: 2026-11-04 Study route and exercise: University Reading List editorial project. The archive, people and reports below are invented. The exercise separates truth, belief and evidential support; it does not stipulate one universally accepted definition of knowledge. ## Choose your starting point - [ ] Begin free with the questions Use Rebus to compare analysis of knowledge, justification and social epistemology. - [ ] Study sources systematically Use Audi for perception, memory, testimony and inferential support. - [ ] Challenge a reductive definition Use Williamson after epistemology and elementary logic to examine knowledge-first arguments. ## Compare the three books ### Introduction to Philosophy: Epistemology Brian C. Barnett (book editor); Christina Hendricks (series editor) · 2021 Free conceptual route Choose it when: You need introductory arguments with social and feminist epistemology alongside traditional questions. Use another route when: You need an advanced monograph or only a probability manual. Selected reading: Read chapters 1–2 on knowledge/justification and chapter 7 on social epistemology. Limits and trade-offs: A survey presents competing approaches, not a verdict machine for every testimony case. #### Try before choosing List the truth, belief and support claims in the archive packet separately. Check your work: The analyst’s supplied truth is not silently added to the learner’s evidence. Your notes: ________________________________ ISBN: 9781989014264 [Official free reading](https://press.rebus.community/intro-to-phil-epistemology/) [Book record and access options](https://unireadinglist.com/subjects/philosophy/introduction-philosophy-epistemology-rebus/) ### Epistemology: A Contemporary Introduction to the Theory of Knowledge Robert Audi · 3 · 2011 Systematic sources and structure Choose it when: You want a sustained account of how testimony and inference depend on sources. Use another route when: You only need a short first definition or knowledge-first specialist argument. Selected reading: Read the selected third edition’s testimony, inference and structure-of-knowledge discussions. Limits and trade-offs: A source taxonomy does not decide every reliability dispute without facts about the particular chain. #### Try before choosing Draw S→D→E and identify every original observation. Check your work: There is one observation at S; faithful copying adds transmissions, not two eyewitnesses. Your notes: ________________________________ ISBN: 9780415879231 [Book record and access options](https://unireadinglist.com/subjects/philosophy/epistemology-a-contemporary-introduction/) ### Knowledge and Its Limits Timothy Williamson · 2002 Knowledge-first theory Choose it when: You know standard knowledge analyses and can track a dense philosophical argument. Use another route when: You need a first introduction to reasons or elementary logic. Selected reading: Read the introduction and the discussions of knowledge as a mental state and evidence in the selected copy. Limits and trade-offs: Do not reduce a theoretical disagreement to a simple number-of-sources formula. #### Try before choosing Ask where knowledge or adequate support first enters the testimony chain. Check your work: Three consistent assertions cannot manufacture an original evidential basis if none is supplied. Your notes: ________________________________ ISBN: 9780199256563 [Book record and access options](https://unireadinglist.com/subjects/philosophy/knowledge-and-its-limits/) ## Check your preparation ### Whose evidence is being assessed? Your notes: ________________________________ ### Does dependence make a report false? Your notes: ________________________________ ### Is a defeater always a disproof? Your notes: ________________________________ ## A six-step study plan - [ ] Separate perspectives Selected reading: Rebus: knowledge and justification. What to do: Make analyst and learner evidence columns. Check your work: The actual box location appears only in the analyst column. Your notes: ________________________________ - [ ] Trace provenance Selected reading: Audi: testimony. What to do: Draw the complete report graph. Check your work: Every arrow has a supplied copying relationship. Your notes: ________________________________ - [ ] Count observations Selected reading: Audi: inference. What to do: Distinguish one observational ground from three agreeing texts. Check your work: No independence is inferred from different signatures. Your notes: ________________________________ - [ ] State the warrant Selected reading: Rebus: social epistemology. What to do: Explain why the original source is credible in the main packet. Check your work: Use stipulated observation/reliability, not mere repetition. Your notes: ________________________________ - [ ] Apply the defeater Selected reading: Audi alongside follow-up. What to do: Identify the exact premise the audit removes. Check your work: It defeats observation-based trust, not p by logical negation. Your notes: ________________________________ - [ ] Compare conceptual claims Selected reading: Williamson with the introductory routes. What to do: Write truth, justified reliance and knowledge questions separately. Check your work: Do not claim the books unanimously endorse your preferred knowledge analysis. Your notes: ________________________________ ## Worked exercise: Three reports, one observation Let p mean “archive item A is in box 4”. The analyst is told p is true and S’s check was correct. Learner L cannot access the item. L receives D saying p and E saying p, and a provenance report stating that S inspected the item and recorded p, D faithfully copied S and E faithfully copied D. L knows S is usually reliable but can make mistakes; L is not told that this particular check was correct. Compare truth, L’s support and independent corroboration. Construct another world compatible with L’s available information in which p is false. Assumptions: The analyst’s actual-state facts are not separately revealed to L. L’s entire information is the reports, the inspection/copying provenance and S’s ordinary fallible reliability, with no supplied defeater. No numerical error rate or sufficient definition of knowledge is stipulated. Your notes: ________________________________ ## Change an assumption: The original check was a guess Change the underlying scenario: replace the main case’s correct inspection with an unchecked guess. Keep actual p true and L’s initial D/E reports and provenance claim unchanged. L then receives a trustworthy audit that S did not inspect the item and guessed box 4. D and E copied faithfully. L learns the audit but has no other location evidence; the analyst’s knowledge that p remains true is not revealed to L. Your notes: ________________________________ ## Before moving on - Choose readings by introductory questions, source structure and advanced theory. - Trace testimonial dependence without erasing a credible original source. - Explain how a defeater changes support without necessarily changing truth. ## Answer and interpretation ### Whose evidence is being assessed? The learner’s. The analyst also receives the actual location so that truth can be checked; that extra fact is not a new message to the learner. ### Does dependence make a report false? No. It changes how much independent corroboration agreement supplies, not its truth value by itself. ### Is a defeater always a disproof? An undercutting defeater can remove confidence in the source-to-claim link without establishing the opposite claim. ### Three reports, one observation 1. The original observation occurs at S. D and E are two transmissions along S→D→E, not independent observations. Counting signatures would overstate corroboration. 2. Under the supplied reliability and absence-of-defeat premises, L has a credible testimonial route to p through S. Dependence does not make the true reports false or automatically eliminate all support. 3. A question about knowledge still concerns whether the relevant conditions for knowledge are met, not whether enough documents agree. The packet warrants a source-based support analysis without settling every theory of knowledge. 4. In another world compatible with L’s information, the item is in box 5 and S makes a one-off label-reading mistake, recording box 4. D and E copy exactly as before; L receives the same reports and provenance. This differs from the analyst’s actual world, not from L’s evidence. Ordinary fallible reliability permits the mistake. Thus the available evidence does not logically guarantee p. If p is false, L cannot know p even if its belief remains reasonable; truth is necessary for knowledge, but a full sufficient analysis is not supplied. In the actual world p is true and L has a credible but fallible testimonial basis. Agreement supplies no independent second check, and the same available evidence is compatible with a false-p world. Truth, reasonable support and knowledge must therefore be assessed separately. Test the result: Do not let L use the analyst’s knowledge that the actual check was correct. The false-p countermodel preserves L’s information, not every hidden fact of the actual world. Dependence alone does not erase S’s potential support. ### Change an assumption: The original check was a guess 1. The audit removes the supplied observational basis of S’s record. Faithful transmission preserves the content of the guess; it cannot restore the missing check. 2. The reports remain true in the analyst’s actual-state packet. L’s former reason to trust this particular record is undercut, even though no evidence for “not in box 4” is supplied. 3. L should withdraw the claim that the reports provide checked observational support and seek a new check. Withholding p is compatible with p’s being true; it is not asserting not-p. The case now illustrates a true repeated claim whose stated evidential route has been defeated. Repetition does not cure the missing basis, and the analyst’s truth does not repair L’s justification. Test the result: Separate undercutting from rebutting and belief from its grounds. No numerical confidence or universal philosophical verdict is invented. ## Common mistakes ### Agreement becomes independence Trace origin rather than counting documents. ### Truth becomes justification A true conclusion can outlast the defeat of the reason used for it. ### Defeat becomes negation Lacking support for p is not evidence that not-p is true. ## Sources and edition checks - [Rebus: official open epistemology](https://press.rebus.community/intro-to-phil-epistemology/) The 2021 Rebus volume is CC BY 4.0 except credited material and includes traditional and expanded epistemology. - [Audi: selected third edition](https://www.routledge.com/Epistemology-A-Contemporary-Introduction-to-the-Theory-of-Knowledge/Audi/p/book/9780415879231) Audi’s selected third edition is a systematic source-and-structure route, with named topics matched to that copy. - [Williamson: selected Oxford record](https://academic.oup.com/book/12538/chapter-abstract/162294409) Williamson’s selected 2002 paperback is an advanced knowledge-first argument, not a simple evidence-counting method. These are proposed study activities, not official course assignments or a claim that every book has been read cover to cover. [How we curate](https://unireadinglist.com/editorial/)