[armydoc]

The catechism and all papal encyclical are infallible and binding, then?

[marshmallow]

They contain some material which has been infallibly defined and some which has not. Only doctrines of faith and morals fall under the scope of infallible ecclesiastical teaching. Since the scope of the Catechism is somewhat wider than this, it contains material which is not absolutely binding (e.g. social teaching). One must look to other documents and to the tradition of the Church to establish the doctrinal weight of any particular point in the Catechism.