Case 14 of 20 · Evidence & Research
Evidence in History
🔎 Case Brief #14
Your school board is debating a new policy related to how historians use evidence.
🎯 Your mission
Prove it.
⚡ The twist
One source is lying. Figure out which.
What you'll learn · 1 of 4
How do we know what happened 2,000 years ago? Artifacts, documents, buildings, and other evidence! Historians are like detectives of the past.
At this level, how historians use evidence requires you to move beyond surface-level thinking and engage with complexity, nuance, and ambiguity.
At this level, you're ready to move beyond surface-level thinking and engage with complexity. Real-world problems rarely have simple answers, and developing comfort with ambiguity is a crucial skill.
What you'll learn · 2 of 4
Here's a framework for approaching how historians use evidence:
1. Frame the question precisely. Vague questions lead to vague answers. Instead of "Is this good?" ask "What are the specific benefits and drawbacks, and for whom?"
2. Examine the evidence critically. Not all evidence is equal. Consider the source, the methodology, the sample size, and potential biases. Strong evidence comes from reliable sources with transparent methods.
3. Consider multiple perspectives.
What you'll learn · 3 of 4
Every issue looks different from different viewpoints. Before forming your opinion, genuinely try to understand why someone might disagree with you. This isn't about being wishy-washy — it's about being thorough.
4. Watch for thinking traps. Confirmation bias (only seeing evidence that supports your existing belief), anchoring (being overly influenced by the first piece of information), and false dichotomies (assuming there are only two options) can derail even careful thinkers.
5. Build your argument with structure.
What you'll learn · 4 of 4
A strong position has: a clear claim, supporting evidence, logical reasoning connecting the evidence to the claim, and honest acknowledgment of limitations or counterarguments.
6. Apply second-order thinking. Don't just ask "What happens next?" Ask "And then what happens after that?" Many unintended consequences become visible only when you think two or three steps ahead.
Use this framework as you work through the scenario and questions below.
Key idea: How historians use evidence
Think about this
Your school board is debating a new policy related to how historians use evidence. Construct both the strongest argument FOR and AGAINST the policy. Which position is better supported, and why?
How a thinker does it
- 🔍
Frame the Question
Define the core question about how historians use evidence precisely. What assumptions are built into how it's framed?
- 🧪
Assess Evidence
What evidence exists? Rate each piece as strong, moderate, or weak. Note gaps.
- 🧪
Generate Hypotheses
Develop at least 3 possible explanations or solutions. Include one unconventional option.
- ⚖️
Evaluate Systematically
Test each hypothesis against the evidence. What are the trade-offs? What are the risks?
- ⚖️
Think Ahead
If your conclusion is correct, what are the second-order effects? What implications follow?
- 🎯
State Your Position
Present your conclusion with confidence level (%), key reasons, and what could prove you wrong.
- 🪞
Metacognitive Check
What biases might have influenced you? Did you use the right thinking framework? What would you research further?
Remember
- 1Master how historians use evidence
- 2Apply evidence & research in real situations
- 3Build habits of evidence & research
Words to know
- Steelmanning
- Making the strongest possible version of an opposing argument
- Dialectic
- Finding truth through examining opposing viewpoints
- Falsifiability
- The ability of a claim to be proven wrong — a requirement for scientific validity
- Epistemology
- The study of how we know what we know
Solve the case · 1 of 3
Case 1
1 of 3What is the main idea of how historians use evidence?
Solve the case · 2 of 3
Case 2
2 of 3How can you apply evidence & research in daily life?
Solve the case · 3 of 3
Case 3
3 of 3Good critical thinkers always:
Nice work!
You got 0 of 3 right.
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✨ More to explore
🌍 Why this matters: The ability to apply evidence research rigorously is what distinguishes competent professionals from exceptional ones in virtually every field.
💬 Talk about it
- Find a current event that illustrates how historians use evidence in action. What can we learn from it?
- What are the limitations of this thinking framework? When might it lead you astray?
- How would someone from a completely different background or culture approach this differently?
- Design a challenge or game that would help someone practice this skill.
🏆 Try this week: Ask: how does this person know what they're saying?
👨👩👧 At dinner: “How do you know when to trust what someone tells you?”
Challenge a friend
Can they solve this case? Share it on IG, TikTok, or WhatsApp.
Ready?
Evidence in History
Prove it.
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