When a Planet Isn't

The IAU threw a monkey-wrench into their otherwise smooth definition. Now, to be a proper planet, a body must have cleared its neighborhood of other bodies; a qualification based not upon what the body is, but upon what's about it.

What then, does clearing the neighborhood mean? Neptune has Pluto crossing its orbit, Jupiter has many trojan asteroids, and Earth has NEA's all about.

"Dwarf planet" is fine for describing a subset of planets, but to say they aren't planets at all defies semantic sense. Isn't a dwarf pear tree still a pear tree?