I am having a lot of success rationalizing my excessive question-asking at the summer school. It just occurred to me that physical scientists (and economists) and social scientists of a critical bent learn differently. Scientists look for patterns and consistency, while social scientists look for chaos and inconsistency. Scientists look for solutions to problems, while social scientists look to problematize accepted wisdoms and solutions. Which could be why social science students asks so many questions and scientists don't. It sounds like a rank generalization but I am going to leave it here.
Also, I have realized it is easier to asks questions in class than after class. In class, you ask a question, you get the answer or an admission or an evasion and you are done with it. No small talk, no trying to size up a situation and figuring out when to end the conversation. None of these skills come naturally to me, so I am perfectly happy to run the risk or sounding stupid or arrogant with my excessive questions. I have just met one lecturer with whom I would have liked to have an extended conversation and I did. With the others, I am just not that interested in their topics beyond understanding in a very broad sense what they are up to.
Also, I have realized it is easier to asks questions in class than after class. In class, you ask a question, you get the answer or an admission or an evasion and you are done with it. No small talk, no trying to size up a situation and figuring out when to end the conversation. None of these skills come naturally to me, so I am perfectly happy to run the risk or sounding stupid or arrogant with my excessive questions. I have just met one lecturer with whom I would have liked to have an extended conversation and I did. With the others, I am just not that interested in their topics beyond understanding in a very broad sense what they are up to.