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import NNG.Metadata
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import NNG.MyNat.Addition
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Game "NNG"
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World "Proposition"
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Level 7
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Title ""
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open MyNat
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Introduction
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"
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"
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Statement
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""
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(P Q R : Prop) : (P → Q) → ((Q → R) → (P → R)) := by
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intro hpq hqr
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intro p
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apply hqr
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apply hpq
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exact p
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Conclusion
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"
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"
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