rcases hpq with ⟨hp', _⟩
case inr.inr
p q : ℝ≥0∞
hpq✝ : p⁻¹ + q⁻¹ = 1
hp : ¬p = ⊤
hq : ¬q = ⊤
hpq : p = ⊤ ∧ q = 1
⊢ (ENNReal.toNNReal p).IsConjExponent (ENNReal.toNNReal q)
case inr.inr.intro
p q : ℝ≥0∞
hpq : p⁻¹ + q⁻¹ = 1
hp : ¬p = ⊤
hq : ¬q = ⊤
hp' : p = ⊤
right✝ : q = 1
⊢ (ENNReal.toNNReal p).IsConjExponent (ENNReal.toNNReal q)