You start with the object Fronstide, then pop OVER to a CROOKED GRIND position. There's a meridian running through the middle of the object that determines Frontside or Backside. If you pop over that meridian into a K-Grind position, that's an Overcrook. If you lock into either grind proper, it's irrefutably evident which grind you are in. A Nosegrind position should never be a Crooked Grind position, even if you're scraping. Same way a 5-0 will never be a Salad.
I think the logic I heard on The Bunt was that a round rail can't be divided or some shit? The fucking EARTH is round. We decided a long time ago there's lines all over that shit. Most important of which are the Prime Meridian and the Equator, who respectively cut the bitch in half.
In sum, if you think a FS Overcrook is a FS Nosegrind, you're a fucking Flat Earther.