Something you’re just good at with minimal effort and/or you learned much more quickly than average.
For me, it’s paper snowflakes. My brain just seems to effortlessly figure out what cuts to make to the paper wedge to make it turn out exactly how I want it. Largely useless, but good fun and was a much-needed ego boost when I was a kid :]
Completely agree with your suggestion for handling this issue. This is something I’ve experienced most of my life as well and have only started realizing it at work the past few years. As I started working on more complicated subjects with a lot of room for ambiguity and error, I really have to make sure and qualify what I know for certain and what is more speculation in my work conversations.