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Learn through experiments

Match a claim to its original record

Does the cited document establish the claim’s scope and time?

1 · Try

Start with a concrete question

Inspect complete short original maintenance excerpts and a broader summary. The fixture does not access live news.

Try the initial inputs, then write a prediction before changing one setting. All calculations run locally on your CPU.

Go directly to the experiment · Review basic mathematics

2 · Predict

What do you expect?

Before changing a setting: Does the cited document establish the claim’s scope and time? Write what you expect and why.

3 · Experiment

Change one thing. Inspect what happens.

  1. Read the original excerpt and identify population, time and measurement.
  2. Select a claim and check the exact match.
  3. Compare the summary with its underlying original.
  4. Create a source table and rewrite an unsupported headline.
Experiment inputs
Inputs
Your settingsMechanism
Calculation belowEvidence
Compare outcomes
Exact claim supported by selected document1 claim
Inspected fountains reported directly15 fountains

Follow the calculation

  1. Original maintenance log, Monday 08:00: “Inspected 15 fountains in the north building; 12 worked.”
  2. Claim to verify: 12 of 15 north-building fountains worked Monday morning.
  3. Population, date and numerator/denominator match the selected original record.

Open the original record and match the claim’s place, time and measurement. A summary can omit constraints or broaden the population.

Create a claim-to-source table

For each claim, write the original record, date, population, measurement and whether that exact claim is established. Rewrite the broad headline.

119/8,000 characters. Drafts save locally and are included in backups. Importing or opening a draft never runs it.

Compare with my earlier draft
Claim: the campus repair program improved water access.
Source: a summary says most fountains work.
Conclusion: proven.

Explain what you changed and why in your observation notes. Text differences do not establish quality.

Inspect an example solution after your attempt
Monday original: north building, 08:00, 12/15 working. Tuesday original: whole campus, 08:00, 18/30 working. These support their specific counts. Neither alone establishes a change for a matched population or a causal repair effect.

This is one worked example. Test another input and explain its limitations.

Captures keep your inputs, prediction and observation. Results are recalculated from those inputs. Resetting inputs keeps your captures and challenge history.

4 · Understand

Explain the mechanism

Match a claim to its original record

Inspect complete short original maintenance excerpts and a broader summary. The fixture does not access live news.

Follow the mechanism

A source can support a narrow statement without supporting a broader one.

Counts from different dates or places cannot be silently substituted.

A maintenance count does not by itself identify the causal effect of a repair program.

Worked example

Original maintenance log, Monday 08:00: “Inspected 15 fountains in the north building; 12 worked.”

Claim to verify: 12 of 15 north-building fountains worked Monday morning.

Population, date and numerator/denominator match the selected original record.

Calculation

Exact support requires matching population, observation time and stated measurement; no probability of truth is assigned.

Try a controlled comparison

  1. Read the original excerpt and identify population, time and measurement.

  2. Select a claim and check the exact match.

  3. Compare the summary with its underlying original.

  4. Create a source table and rewrite an unsupported headline.

What this does not establish

  • All messages, people, documents and outcomes here are original fictional teaching fixtures; results are not measurements of real organizations.
5 · Apply

Try a fresh case

An original record inspects 20 of a campus’s 50 fountains. How many fountains were not included in that inspection?

This is a public practice check. Retries support learning; matching a number does not certify independent proficiency.

Take the investigation further

Choose any extension. These are project prompts for you to carry out; they are not automatically assessed.

School investigation

Create a new case with different numbers and explain your decision to a classmate.

College investigation

Implement or analyze a fresh case, document assumptions and compare at least two alternatives.

Workplace investigation

Prepare a decision artifact with evidence, operating constraints, an owner and a follow-up measurement.

6 · Continue

Keep the evidence, choose your next step

Completion records your own decision that you have worked through this investigation. Practice checks and independent project evidence are separate.