Both of you are right

I did NOT turn on the non-lethal attacks ...
As during my 24 months with EA and Release I had never used non-lethal damage before, I failed to notice that besides the swirling icon in the Hotbar there is is an ICON next to the Portraits telling me about it ...
I so stupid!!11
Testing revealed something amusing, though. If you don't have a weapon and you have non-lethal attacks turned ON, you deal Blugedoning damage with Unarmed Attack and Slashing damage with the Riposte's Superiority Dice.