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import NNG.Metadata
import NNG.MyNat.Addition
import Std.Tactic.RCases
import Mathlib.Tactic.LeftRight
--import Mathlib.Logic.Basic
Game "NNG"
World "AdvProposition"
Level 6
Title ""
open MyNat
Introduction
"
Statement
""
(P Q : Prop) : Q → (P ∨ Q) := by
intro q
right
assumption
NewTactic left right
Conclusion