obtain ⟨k, hk₁, hk₂⟩ := index_exists hw
n d : ℕ
inst✝ : NeZero d
w : Weight n d
hw : normalized w
hmin : ∀ (u : Weight n d), Monotone u → u ≤ w → w ≤ u
hb : ¬balanced w
⊢ False
case intro.intro
n d : ℕ
inst✝ : NeZero d
w : Weight n d
hw : normalized w
hmin : ∀ (u : Weight n d), Monotone u → u ≤ w → w ≤ u
hb : ¬balanced w
k : Fin (Nat.succ n)
hk₁ : w k = 0
hk₂ : Monotone (Function.update w k 1)
⊢ False