Activity 01
Mary's Room Debate
Divide the class into two groups. One group argues that Mary learns something new upon leaving the room, supporting property dualism. The other group argues she learns nothing new (or only gains 'ability knowledge'), defending physicalism. Each side prepares opening statements, rebuttals, and a conclusion.
Explain Descartes' conceivability and indivisibility arguments for substance dualism.
Facilitation TipProvide students with a clear structure and key philosophical terms to use in their arguments to keep the debate focused.
What to look forAn essay question such as 'Assess the claim that the knowledge argument successfully refutes physicalism.' This allows students to demonstrate understanding, analysis, and evaluation.
AnalyzeEvaluateCreateSocial AwarenessRelationship Skills
Generate Complete Lesson→· · ·
Activity 02
Qualia Inventory
In pairs, students create a list of five different 'qualia' they have experienced. They must then attempt to write a purely physical, scientific description of that experience, highlighting where and why the description fails to capture the subjective character of the experience.
Analyse the problem of interaction: how can an immaterial mind cause changes in a physical body?
Facilitation TipEncourage students to think beyond simple sensations like colour to more complex experiences like nostalgia or the taste of a specific food.
What to look forAn 'exit ticket' where students must write down, in their own words, the strongest objection to the knowledge argument and why they think it is (or is not) successful.
AnalyzeEvaluateCreateSocial AwarenessRelationship Skills
Generate Complete Lesson→· · ·
Activity 03
Argument Reconstruction
Provide students with a jumbled version of the premises and conclusion of the knowledge argument. In small groups, they must reconstruct the argument into a logically valid form (P1, P2, C) and then identify which premise a physicalist is most likely to attack.
Evaluate whether the mind is better understood as a substance or as a set of properties.
Facilitation TipThis works well as a consolidation activity after the initial explanation of the argument, reinforcing its logical structure.
What to look forProvide students with a checklist of key concepts and arguments from the topic. They can rate their confidence level (e.g., red, amber, green) for each, identifying areas for revision.
AnalyzeEvaluateCreateSocial AwarenessRelationship Skills
Generate Complete Lesson→A few notes on teaching this unit
Begin by grounding the abstract concept of 'qualia' in students' own experiences: what is it like to taste chocolate or hear a favourite song? Introduce the Mary's Room scenario as a story, encouraging intuitive responses before formalising it as a philosophical argument. Use structured debate and argument mapping to help students deconstruct the premises and analyse the key objections.
By the end of this topic, students will be able to analyse Frank Jackson's knowledge argument in detail and evaluate its success as a challenge to physicalism.
Watch Out for These Misconceptions
Property dualism is the same as substance dualism.
Substance dualism (like Descartes') claims there are two fundamental kinds of 'stuff' in the universe: physical substance and mental substance. Property dualism claims there is only one kind of substance (physical), but it has two distinct kinds of properties (physical and mental).
The knowledge argument proves that God or a soul exists.
The knowledge argument is specifically about the nature of conscious experience and its properties. It argues against physicalism but does not, on its own, provide evidence for a non-physical soul or a deity; it only concludes that some properties are non-physical.
If Mary learns something new, it means physicalism is completely wrong about everything.
The argument targets a specific claim of physicalism: that all knowledge is physical knowledge. A physicalist could respond by modifying their position, for example, by arguing that Mary gains a new ability or a new perspective, not a new piece of factual information about the world.
Methods used in this brief