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Philosophy · 3rd Year

Active learning ideas

The Limits of Science and Reason

This topic examines the boundaries of what can be known through the scientific method and pure reason. Students explore the 'demarcation problem', what separates science from non-science, and consider questions of value, purpose, and aesthetics that science may not be equipped to answer. This aligns with NCCA Philosophy LO 2.4 and supports the Junior Cycle 'Nature of Science' strand.

NCCA Curriculum SpecificationsNCCA Philosophy LO 2.4: Discuss the limits of human knowledge.SOL 20: The student uses appropriate technologies in meeting a design challenge.
20–45 minPairs → Whole Class3 activities

Activity 01

Inquiry Circle40 min · Small Groups

Inquiry Circle: The Tool Box

Groups are given 'problems' like 'How do I cure cancer?' and 'Is this painting beautiful?'. They must decide which 'tools' (Scientific Method, Logic, Intuition, Tradition) are appropriate for each and explain why some tools fail in certain areas.

Can science explain everything?
AnalyzeEvaluateCreateSelf-ManagementSelf-Awareness
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Activity 02

Formal Debate45 min · Whole Class

Formal Debate: Can Science Explain Love?

One side argues that love is purely chemical and biological (reductionism), while the other argues that the 'experience' of love cannot be captured by data. Students must use specific examples to support their claims.

What are the limits of human reason?
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Activity 03

Think-Pair-Share20 min · Pairs

Think-Pair-Share: The Unprovable Truth

Students try to think of one thing they believe is true but cannot be proven by a laboratory experiment. They share with a partner to see if their partner can find a way to 'test' it scientifically.

Are there truths that cannot be proven?
UnderstandApplyAnalyzeSelf-AwarenessRelationship Skills
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A few notes on teaching this unit


Watch Out for These Misconceptions

  • If science can't prove it, it's not true.

    Many things (like mathematical truths or moral values) aren't 'proven' by science but are still considered true. Using 'Category Sorting' helps students see that different types of truth require different types of proof.

  • Philosophy and Science are enemies.

    Science actually began as 'Natural Philosophy'. Peer-teaching the history of thinkers like Newton helps students see that philosophy provides the logical framework that science uses to operate.


Methods used in this brief