And just how is that not a boundary? You're drawing a line between "this thing" and "that thing". A line is the epitome of boundaries and talking in circles about it doesn't change the fact that drawing a line is creating a "boundary".

"A rose by any other name..." means something profound and igboring it doesn't mean a rose smells any less sweet. Call it whatever you want but words don't change facts. They do elucidate them, though. A line between any two or more things is a "boundary" and there's no getting around that fact.