phc/lean4game - lean4game - Gitea - PHC

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-												add NNG

											
										
										
											2 years ago
+								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
 								"
 								"