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Conditionals Embedded in Arguments
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LSAT
LR.058 Conditionals Embedded in Arguments
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In this security escalation argument, which analysis best identifies whether the argument uses the conditional validly?
A
The argument is invalid because contrapositives cannot be used across more than one conditional.
B
The premises form door alarm genuine -> night manager contacted -> response log opened. Not response log opened yields not night manager contacted and then not door alarm genuine, so the contraposed chain is valid.
C
Not response log opened can prove not night manager contacted, but it cannot say anything about door alarm genuine.
D
The reasoning would be valid only if the premises also stated response log opened -> door alarm genuine.
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