Owning the sideline?

[Spence]

Originally Posted by Snaqwells

The part that says a player is entitled to their spot on the court.
Think about it, if the player is standing with her back to the dribbler, minding her own business, when the dribbler runs by and clips her knocking both players to the floor, who are you going to call the foul on? There's no LGP (defender never faced the opponent.)

That defender is not "guarding" as the defender is in the OP.

So if we're talking about a defender is by definition "guarding" doesn't LGP have to be established? If so, does the defender have LGP is he/she has a foot out of bounds?