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In formal logic, what does "Only (if)" identify?

Necessity
Mutually Exclusive
Conclusion
Sufficient Condition

The correct answer is: Necessity

In formal logic, "Only if" identifies a necessary condition. This means that if one event is only true if another event occurs, then the second event is necessary for the first event to happen. In this case, the correct answer is A. Options B, C, and D are not correct in this context: - Mutually exclusive refers to events that cannot happen at the same time. - Conclusion refers to the final part of an argument or reasoning. - Sufficient condition refers to a condition in a conditional statement that, if true, guarantees the truth of the conclusion.