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Necessary and Sufficient Conditions
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Speech & Debate
SD.112 Necessary and Sufficient Conditions
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A rule says, "A team advances unless it receives two losses." Which statement is guaranteed by the usual logical reading of "unless"?
A
If the team advances, then it did not receive two losses.
B
If the team receives two losses, then it cannot advance under any circumstance.
C
If the team does not receive two losses, then it advances.
D
The team advances if and only if it receives two losses.
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