938 prompts matching "Empty set and its notation"
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Worked Example: The truth table for the conditional
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Quiz: Why a conditional with a false antecedent counts as true
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Practice: The converse of a conditional
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Spot My Mistake: The contrapositive of a conditional
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Worked Example: The truth table for the biconditional
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Quiz: The biconditional as two conditionals taken together
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Practice: What logical equivalence means
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Spot My Mistake: De Morgan's laws in logic
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Final Revision: A biconditional used in a mathematical definition
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Worked Example: What a contradiction is
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Quiz: What a contingency is
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Practice: Showing that a statement is a tautology
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Spot My Mistake: The law of the excluded middle
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Final Revision: A longer statement tested for tautology
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Quiz: Modus ponens
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Practice: Modus tollens
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Spot My Mistake: Disjunctive syllogism
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Worked Example: Arranging r of n objects in a line
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Quiz: Arrangements of a word with no repeated letters
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Practice: Arrangements of a word with repeated letters
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