Performance task rubric · Logic and Propositions

Argument analysis with logic

Task. Collect three arguments from advertisements, social media posts or news commentary. Translate each into propositional form with connectives, build a truth table or identify the argument form, decide whether it is valid, and explain the result in plain language to a classmate.

Learner / group

Criteria	4 · Excellent	3 · Proficient	2 · Developing	1 · Beginning	Weight	Score
Symbolisation	Propositions and connectives are identified correctly for all three arguments, with a key.	Correct for two arguments; one connective misread.	Symbolisation attempted but often incorrect.	No symbolisation.	25%	—
Comment on “Symbolisation”
Truth tables / argument forms	Truth tables are complete and correct, or valid forms (modus ponens, modus tollens, syllogism) are correctly named.	Tables correct with one row error; forms named.	Tables incomplete or forms misnamed.	No tables or forms.	30%	—
Comment on “Truth tables / argument forms”
Validity judgement	Each argument is correctly judged valid or invalid, with fallacies named where present.	Judgements correct; fallacies not named.	One judgement incorrect.	Judgements missing or mostly wrong.	25%	—
Comment on “Validity judgement”
Plain-language explanation	Explanation is accurate, uses an everyday example, and a classmate could repeat the reasoning.	Accurate explanation with some jargon.	Explanation partly accurate.	No explanation.	20%	—
Comment on “Plain-language explanation”
Total					100%	0/4 scored

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