OK I will take a jab at it. When the software detects an emissions test (we know they can do that) it sprays water on the intercooler to reduce emissions, ie “cheat”... In real usage, this does not happen except when hot and/or at the track smileyangry  Else you would use water often and people do not want to have to refuel water on a $250k car. That would be very sneaky. Very very sneaky, but would that be surprising?