Sure. You handed me the opportunity on a silver plate, and I couldn't resist making a joke, albeit a poor one.
No big deal. By correcting me, you just took away an opportunity for me to feel useful. 
No big deal. By correcting me, you just took away an opportunity for me to feel useful. 

Besides: I know my own limits very well. Very far away from actual "know-it-all". It is half-knowledge at best and not going into deep understanding of the underlying technological aspects.