What are two examples of jems maturity in chapter 14?

In Chapter 14 of "To Kill a Mockingbird," Jem shows maturity by defending Scout from Aunt Alexandra's criticisms and by standing up to his father, Atticus, when he tries to keep certain information from Jem relating to Tom Robinson's trial. These instances demonstrate Jem's growing sense of independence and his willingness to challenge authority for what he believes is right.