∀ {expr type : Lean.Expr} {modified : Bool} {expr_1 type_1 : Lean.Expr} {modified_1 : Bool},
  { expr := expr, type := type, modified := modified } = { expr := expr_1, type := type_1, modified := modified_1 } →
    expr = expr_1 ∧ type = type_1 ∧ modified = modified_1