The whole process of theology is one of seeking to understand faith by reason: as St. Anselm said, "fides quarens intellectum." (Yes, that's the same Anselm who gave us the Ontological Proof for the Existence of God).
Of course, there are any number of questions that are considered answered by theologians faithful to the Magisterium. But even answered questions benefit for new explanations in new ages, as Cardinal Newman argued.
And there are a large number of questions where the answers are less certain. Some Post-Vatican II theologians have pushed this concept beyond its limit, but even before Vatican II Catholic theologians recognized the concept of "theological notes" and viewed some doctrines as more firmly established than others. My Marist theology professor in college was quite interesting on this point.
There is one rather obvious theological question, produced by two basic tenets of Catholic theology, that is completely off-limits for discussion. If you are really as knowledgeable about Catholic theology as you claim to be, you'll know what it is and why it's off limits. It's not something you can cut-and-paste from a Catholic website.