When non-believers say "empirical evidence," it means they won't accept anything as evidence unless it's in just the way they want. Of course, God providing them that would defeat one of the primary reasons we're here to begin with.
I should also add that, despite there being many definitions of God created by man, it doesn't mean there isn't one true definition and the rest are either partially correct or wrong altogether.
Well then, it ought to be pretty dang simple for ya: simply present the empirical evidence and state the "one true definition".
"Generosity. That was my first mistake." "Experience must be our only guide; reason may mislead us." "Instagram is Twitter for people who can't read."
