Bet your ass. Foolishness should be challenged wherever you meet it. Especially in the form of a "I once did some ATPL exams so I know all about aircraft systems". As we all know (well most of us), ATPL exam content bears no similarlity to real life.
Anybody with an ounce of professionalism assumes nothing and questions everything.
Now would you have said that you said above to me in a bar over a pint?
Didn't think so...