Logic & Reasoning
🌿 Whakataukī (Māori Proverb)
"He aha te mea nui o te ao? He tangata, he tangata, he tangata"
Meaning: What is the most important thing in the world? It is people, it is people, it is people
Today we learn that good reasoning serves people - it helps us make better decisions and understand truth together. In te ao Māori, wisdom comes through collective reasoning and listening to all voices.
🎯 Learning Objectives
By the end of this lesson, you will be able to:
- Identify different types of logical reasoning (deductive, inductive, abductive)
- Recognize common logical fallacies in arguments
- Construct well-reasoned arguments with clear premises and conclusions
- Apply Māori approaches to collective reasoning and decision-making
- Use the SIFT method to evaluate the logical structure of claims
📋 NZ Curriculum Alignment
Social Studies Level 5: Understand how people make decisions about values and social issues (Achievement Objective 5.3)
English Level 5: Show understanding of ideas within, across, and beyond texts, including how writers structure and control texts
Key Competencies: Thinking, Managing self, Relating to others
Te Marautanga o Aotearoa: Te whakatakoto whakaaro me te whakamātau i ngā kōrero
🔍 Engage: Reasoning in Daily Life
We use reasoning constantly! Click each scenario to see different types of reasoning at work:
🧠 Explore: Types of Logical Reasoning
🔬 Deductive Reasoning
Pattern: General rule → Specific case → Certain conclusion
NZ Example:
• All NZ citizens can vote at 18
• Aroha is a NZ citizen who is 19
• Therefore, Aroha can vote
🔍 Inductive Reasoning
Pattern: Specific observations → General pattern → Probable conclusion
NZ Example:
• Wellington has been windy every day this week
• It was windy last week too
• Therefore, Wellington is probably a windy city
💡 Abductive Reasoning
Pattern: Observation → Best explanation → Likely conclusion
NZ Example:
• The kauri trees are dying
• There's a known disease called kauri dieback
• The trees probably have kauri dieback disease
🤝 Activity: Reasoning Detective
In groups of 3, examine the following NZ-based scenarios and identify the type of reasoning used. Be prepared to explain your choices:
- "Every All Blacks game I've watched this year, they've won. They'll probably win today too."
- "All public transport in Auckland requires a HOP card. I need to catch the bus, so I need a HOP card."
- "My phone battery died suddenly, and I noticed it's been getting hot lately. It probably needs replacing."
Time: 10 minutes
🌺 Te Ao Māori: Collective Reasoning
In Māori tradition, decision-making often follows collective reasoning processes:
- Whakatōhea: Gathering diverse perspectives before making judgments
- Kōrerorero: Discussion that considers past, present, and future impacts
- Whakatōtanga: Reaching consensus through reasoned dialogue
- Whakapapa thinking: Understanding connections and relationships in reasoning
This approach values the collective wisdom and ensures decisions benefit the whole whānau/community.
🚫 Common Logical Fallacies
Understanding fallacies helps us spot weak reasoning. Here are some common ones in New Zealand contexts:
🎯 Ad Hominem (Attacking the Person)
Example: "Don't listen to her views on housing policy - she's too young to understand."
Why it's wrong: Age doesn't automatically invalidate someone's reasoning about policy.
🌊 Bandwagon Fallacy
Example: "Everyone's moving to Australia, so it must be better than NZ."
Why it's wrong: Popular choices aren't automatically correct choices.
⚡ False Cause
Example: "Since the new government came in, house prices rose. The government caused high house prices."
Why it's wrong: Correlation doesn't equal causation - many factors affect house prices.
🎭 Straw Man
Example: "You support the smoking ban? So you want to control every aspect of people's lives!"
Why it's wrong: This misrepresents the original position to make it easier to attack.
🕵️ Fallacy Hunt
Find examples of these fallacies in:
- Social media posts about New Zealand issues
- Letters to the editor in NZ newspapers
- Political debates or speeches
Document one example and explain why it's a fallacy. Share with a partner.
Time: 15 minutes
🏗️ Building Strong Arguments
A well-constructed argument has three key parts:
- Premises: The evidence or reasons you're starting with
- Logic: How your premises connect to your conclusion
- Conclusion: What you're arguing for
🎯 Practice: Argument Construction
Topic: Should New Zealand lower the voting age to 16?
Let's build arguments together. Consider:
- What premises (evidence/facts) might support each side?
- How do these premises logically connect to the conclusion?
- What might be the strongest argument for each position?
🛡️ SIFT Method for Logical Claims
When you encounter arguments and claims, use SIFT to evaluate their logical strength:
🛑 STOP
Pause and ask: What is the actual claim being made? What's the evidence? Do I notice any immediate logical problems?
🔍 INVESTIGATE the Logic
Check: Are the premises actually true? Does the conclusion follow from the premises? Are there any logical fallacies?
📊 FIND Better Reasoning
Look for: More complete arguments, counter-evidence, expert analysis of the logical structure.
🔗 TRACE the Argument Chain
Follow: What are the underlying assumptions? What evidence supports each premise? Where did this reasoning originate?
🚀 SIFT Practice: Political Logic
Scenario: "Young people don't vote because they don't care about politics. Therefore, we shouldn't lower the voting age."
Apply SIFT to analyze this argument:
- Stop: What's the claim? What's the reasoning?
- Investigate: Is the premise true? Does the conclusion follow?
- Find: What other explanations or evidence exist?
- Trace: What assumptions underlie this argument?
📝 Assessment: Argument Analysis & Construction
Part A: Fallacy Identification (10 minutes)
Read the provided arguments about New Zealand issues. Identify any logical fallacies and explain why they weaken the reasoning.
Part B: Argument Construction (20 minutes)
Choose one of these New Zealand topics and construct a well-reasoned argument:
- Should NZ become a republic?
- Should te reo Māori be compulsory in all schools?
- Should NZ ban single-use plastic bags nationwide?
Your argument must include:
- ✅ Clear premises supported by evidence
- 🔗 Logical connection between premises and conclusion
- 🌿 Consideration of both Western and Māori perspectives
- 🚫 Avoidance of logical fallacies
- 🤔 Acknowledgment of potential counter-arguments
Success Criteria: Demonstrates understanding of logical reasoning principles, constructs coherent arguments, shows cultural awareness in reasoning.
🤔 Reflect & Connect
Individual Reflection (5 minutes):
- How has learning about logical fallacies changed how you evaluate arguments?
- Which type of reasoning (deductive, inductive, abductive) do you use most in daily life?
- How might Māori approaches to collective reasoning improve decision-making in your community?
Pair Share:
Share one fallacy you've noticed in recent news or social media. Discuss how the argument could be strengthened.