Perhaps the most important concept in the entire text come early in the text, and that is the concept of embedded versus deliberative theology. Embedded theology is that kind of theological content that is in us without our necessarily being aware of it. Embedded theology can come from early childhood ideas of God, Jesus, etc. Embedded theology can come from hymn texts, prayers, and sermons that reinforce ideas. Embedded theology can come from family, friends and neighbours. These are influences, subtle and explicit, that form a theological mindset in a person about just who and what God is, what God wants, what the church and community expects, etc.
Those churches and theological communities that resist critical analysis and reflection stand on shaky ground. They discourage questioning, often appealing to the ultimate source ('Who are you to question God?') when such arise. What is sometimes missed is that it is not God who is being questioned (not that there is necessarily anything wrong with that, given the number of times in the Bible examples of God being questioned and bargained with are presented), but rather an individual's or community's preconceptions of God that are being questioned.
This gets into deliberative theology. Deliberative theology is a second-order process, of asking important questions about who, what, when, where, how and why. Not all questions can be answered. Not all will be relevant. Sometimes, deliberative theology will serve to strengthen the embedded theological ideas; sometimes, deliberative processes will cause a reconstruction and reconception.
Stone and Duke look at the different types of questions to be asked, and what to do with answers, as well as how to deal with ambiguities and inconsistencies. This book is not one that brings theological thinking to a conclusion, but rather is a starting point. It is often used in seminaries as a beginning to theological reflection, either in introductory classes or systematic theology classes (as is being done in my seminary this year). It is also worthwhile reading for anyone who wishes to have a stronger foundation upon which to build the faith of a community, so that honest questions can be dealt with in an honest fashion, rather than ignored or discouraged.