Earlier quoted context omitted.
True but it is all arbitrary. If there was an island twice as big as Greenland, what would it be called? And why is Europe considered a continent when it is more accurately just a peninsula off of Asia? And if we are talking seas, why is the Caribbean a sea when it is just a region of the Atlantic ocean? Even moreso for the Sargasso sea, which is a region right out in the middle of the Atlantic (it doesn't even have…
It's fuzzy rather than arbitrary, because the universe resists categorization. Australia is the dominant landmass on its tectonic plate, and it's relatively far away from other major landmasses. Greenland is a lesser landmass on the North American Plate, and it's much closer to the mainland. Europe, Asia, and Africa are names people gave to the major regions surrounding the Mediterranean long ago. Later generations g…
It's certainly arbitrary that the Gulf of Mexico isn't considered a sea. (or various other "parts of the ocean" referred to as "gulfs" or "bays")
"The main difference between a sea and a lake is that a sea is a part of the ocean."
Ok, so you have decided that the Caspian Sea isn't actually a sea? Well I guess all bets are off if you can do that.... :)