The Law of Detachment justifies the conclusion based on the given premises.
Law of Detachment is the law that justifies the conclusion in this scenario. The Law of Detachment states that if the premise 'If p, then q' is true, and p is true, then q can be concluded to be true as well. In this case, if it is Friday night (p), and if 'If I watch a movie, I will eat popcorn' is true (q), then the conclusion 'I will eat popcorn' is justified.
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