If one believes that a person can be saved in any other way other than the FULL three steps of
Acts 2:38 they are not three steppers. A three stepper demands that
Acts 2:38 be obeyed in Oneness Pentecostal fashion as taught by UPCI.
If you believe there MAY be, COULD be, or MIGHT be exceptions...such as Martin Luther...you're not a genuine three stepper. Plain and simple.
I'm willing to wager...that the vast majority are not three steppers. Even some self proclaimed three steppers appear to ALLOW for one to be saved by God's sovereign grace with only one step. That's essentially proving the strength of the one stepper position.