In this second exploration of the nature of inquiry or investigation, we first review some of what was covered in the first talk. We situate inquiry or investigation within the teaching of the Seven Factors of Awakening, as one of the three "energizing" factors. After outlining five modes of inquiry and reviewing the first two--inquiring with mindfulness and deep listening--covered last time, we explore a third mode of inquiry--using a teaching to guide one's practice--pointing to using several possible teachings as examples. We then focus on a fourth mode--radical questioning--giving several examples. We end with a period of discussion and dialogue.