Unfortunately, that only works if they assume you’re asking the question in good faith, which is rare; the standards of casual debate are so low that most people encountering a similar question are going to interpret it as an attack on their conviction, not as a prerequisite for discussion. In other words, “no, I can’t imagine anything that’d change my mind” probably doesn’t mean what it says on the box, but rather something along the lines of “I’m confident in my opinion; I don’t consider myself a seeker or a lapsed adherent, and I’m not trying to solicit reasons not to hold it”.
This is particularly true when belief in an orthodoxy is cast as virtuous in itself; then admitting vulnerability even in principle means you’re imperfectly orthodox and thus imperfectly moral, and that someone trying to get you to think of vulnerabilities is directly attacking your moral worth. Even without this, though, it’s pretty rare for people who haven’t internalized the notion of falsifiability to be comfortable with taking on their beliefs in this way.
Unfortunately, that only works if they assume you’re asking the question in good faith, which is rare; the standards of casual debate are so low that most people encountering a similar question are going to interpret it as an attack on their conviction, not as a prerequisite for discussion. In other words, “no, I can’t imagine anything that’d change my mind” probably doesn’t mean what it says on the box, but rather something along the lines of “I’m confident in my opinion; I don’t consider myself a seeker or a lapsed adherent, and I’m not trying to solicit reasons not to hold it”.
This is particularly true when belief in an orthodoxy is cast as virtuous in itself; then admitting vulnerability even in principle means you’re imperfectly orthodox and thus imperfectly moral, and that someone trying to get you to think of vulnerabilities is directly attacking your moral worth. Even without this, though, it’s pretty rare for people who haven’t internalized the notion of falsifiability to be comfortable with taking on their beliefs in this way.