Case comparison is useful only when the records are comparable. This lesson asks you to name the provenance, choose one field or rule, and record what the comparison can and cannot show.

A sequence of cases does not become evidence merely because the stories sound similar. The question, chart fields, cited rule or named course convention, and outcome status must stay visible.

Begin with provenance

Case typeWhat it containsWhat it cannot claim
Documented textual caseA traceable source record with a locatorThat every interpretation in the source is universally valid
Recorded contemporary caseA real record with appropriate consent and provenanceMore than the actual record and permission support
Reconstructed teaching caseAn adaptation whose changes are disclosedThat its altered fields or result came from the original source
Invented illustrationUAYA-created inputs for a teaching operationA real outcome or support for a doctrine
Learner exerciseA prompt, chart, or refusal taskA result that has not been observed and recorded

The comparison matrix

Complete one row per claim:

Record ARecord BCompared field or ruleSame inputs and declared authority?Result
provenance + locatorprovenance + locatorone named claimyes / no / unclearsupports / contradicts / unresolved / not comparable

Not comparable is a complete result. Do not force two records into agreement by changing the question, hiding a missing input, or translating different rules into the same vague label.

Three-way weather-case exercise

Use these three records without adding an outcome:

  1. Documented record: the source asks a same-day clear/cloudy question, supplies a chart and interpretation, and later reports an observation.
  2. Reconstructed mechanics record: reproduce Hexagram 3 → 19 and moving lines 2 and 5 from the chart printed in the cited source, while omitting the source interpretation and observation.
  3. Screening exercise: replace the source task with a request for a current local forecast. The correct artifact is refer + stop; there is no chart.

Compare one claim at a time:

ClaimProper comparison result
“The reconstruction reproduces the chart construction.”Compare every reconstructed chart field with the chart printed in the cited source: supports if the fields match.
“The reconstruction verifies the source interpretation.”Not comparable; chart construction does not test interpretation.
“The historical record authorizes a current forecast.”Not comparable; the place, date, task, and evidence owner changed. The proposed present use is excluded.
“The refusal record failed because it has no cast.”Contradicted by the page job; refusal is the intended complete output.

Preserve ambiguity and disagreement

When two genuinely declared authorities differ, name both public locators and record the exact difference. If only one authority is actually stated, do not manufacture a second “course boundary” to make the record look balanced. An unresolved rule may remain unresolved; a later outcome cannot be used to invent or choose an authority retroactively.

Stop condition

Stop at unresolved or not comparable when provenance, question scope, required inputs, declared authority, or outcome status is missing. Do not compare health, legal, financial, safety, relationship, or other consequential cases in this exercise; the previous lesson already routes those questions away from interpretation.

Scope note: the case-type labels distinguish documented observation, reconstructed mechanics, invented exercise, and safety screening in plain language. The comparison matrix and its result labels are explicit UAYA teaching design. The weather-case exercise retains the public-source boundaries recorded in the preceding audit.

Continue to Building a Privacy-Safe Case Library