I know what you mean. For me it was: "Hm. he wrote that with a good confidence. Which part of my knowledge is wrong or incomplete ?" :-) Kind of the same feelin

I know what you mean. For me it was: "Hm. he wrote that with a good confidence. Which part of my knowledge is wrong or incomplete ?" :-) Kind of the same feeling when the significant other garbage-collects a pen you put on the table just a few minutes ago.