apply And.intro <;>
  assumption
case mp.seq.h
S₁ S₂ : Stmt
s t t✝ : State
hS✝ : (S₁, s) ⟹ t✝
hT✝ : (S₂, t✝) ⟹ t
⊢ (S₁, s) ⟹ ?mp.seq.w ∧ (S₂, ?mp.seq.w) ⟹ t

case mp.seq.w
S₁ S₂ : Stmt
s t t✝ : State
hS✝ : (S₁, s) ⟹ t✝
hT✝ : (S₂, t✝) ⟹ t
⊢ State
no goals