1,045 prompts matching "Why the probabilities in a distribution must sum to one"
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Worked Example: Conjunction in a three-variable truth table
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Practice: Negation combined with a compound statement
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Spot My Mistake: Building a truth table column by column
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Learn: The conditional statement, if p then q
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Worked Example: The truth table for the conditional
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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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WAEC Prep: Why a conditional and its contrapositive are equivalent
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Final Revision: A conditional statement set in an everyday situation
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Learn: The biconditional, p if and only if q
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Worked Example: The truth table for the biconditional
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Explain Back: Showing two statements equivalent by truth table
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Spot My Mistake: De Morgan's laws in logic
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Learn: What a tautology is
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Quiz: What a contingency is
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Explain Back: Showing that a statement is a contradiction
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Spot My Mistake: The law of the excluded middle
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WAEC Prep: A tautology used to justify a rule of algebra
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Practice: Modus tollens
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Final Revision: An argument written in words and tested for validity
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