prop_logic_puzzle / example_num_vars6_depth9 /puzzle_247b66bf3bf8f9e5.txt
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new (C β†’ F) β†’ (E ∧ D β†’ ((E β†’ D) β†’ ((D β†’ A) β†’ (C β†’ (((C ∨ F) ∧ D) ∧ ((E ∨ (D β†’ E)) ∨ E)) ∧ E))))
intro
intro
cases 1
intro
intro
intro
cases 1
constructor
constructor
constructor
left
exact 6
exact 3
left
left
exact 2
exact 2