the most effective style?

I'm sure many of you have people or students ask you which is the most effective style. I tell them that styles can't fight. Styles are ideas and concepts principles that we learn and manifest by doing physical moves. The style can do nothing only people can. so the question is not which style is most effective the question is "which martial artists IS" . An analogy is like the man waking up in an alley with a lump on his head. As he sits up he sees a mechanics wrench laying next to him does it really matter what brand name is one the wrench. He got hit by it and it did the job.