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And then I am totally baffled by the object in the picture. I have three climate knobs and they each have the identical raised pattern. So I'm wondering. It can't be braille for a few reasons. 1) a person who reads braille should probably not be driving. 2) If all three knobs have the identical markings it can't be for identification purposes. 3) You push the entire knob and so anywhere you hit is going to get results. So, why?