Theorem: LoVe.abcd_bacb (LoVe/Labs/Lab10Solution.lean)

State before:
a b c d : Prop
h : a ∧ (b ∧ c) ∧ d
⊢ b ∧ a ∧ c ∧ b
Tactic:
intro_and
State after:
case left
a b c d : Prop
h : a ∧ (b ∧ c) ∧ d
⊢ b

case right.left
a b c d : Prop
h : a ∧ (b ∧ c) ∧ d
⊢ a

case right.right.left
a b c d : Prop
h : a ∧ (b ∧ c) ∧ d
⊢ c

case right.right.right
a b c d : Prop
h : a ∧ (b ∧ c) ∧ d
⊢ b

State before:
case left
a b c d : Prop
h : a ∧ (b ∧ c) ∧ d
⊢ b

case right.left
a b c d : Prop
h : a ∧ (b ∧ c) ∧ d
⊢ a

case right.right.left
a b c d : Prop
h : a ∧ (b ∧ c) ∧ d
⊢ c

case right.right.right
a b c d : Prop
h : a ∧ (b ∧ c) ∧ d
⊢ b
Tactic:
repeat' sorry
State after:
no goals

State before:
case right.right.right
a b c d : Prop
h : a ∧ (b ∧ c) ∧ d
⊢ b
Tactic:
sorry
State after:
no goals