LSAT Practice Test

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Prepare for the LSAT with our comprehensive quiz featuring multiple choice questions, hints, and detailed explanations. This is your ultimate guide to mastering the LSAT and boosting your confidence on test day!

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How would you express the relationship between two elements A and B when A cannot be selected unless B is selected in Formal Logic?

A → B, ~B → ~A
B → A, ~A → ~B
A → ~B, ~A → B
B → ~A, ~B → A

The correct answer is: A → B, ~B → ~A

In formal logic, the relationship between two elements A and B where A cannot be selected unless B is selected is represented by the conditional statement "A → B", which means "If A, then B". Additionally, the relationship can be further expressed as its contrapositive "~B → ~A", which means "If not B, then not A". This captures the essential relationship between the two elements in this scenario, making choice A the correct answer. Choices B, C, and D do not accurately represent the relationship where A cannot be selected unless B is selected and thus are not correct in this context.