As I understand it, a decade ago there were 9 planets in our solar system. A few years ago an international astronomical society not only demoted Pluto to be a dwarf planet but re-classified 2 other bodies as dwarf planets. Now, they say there are 8 planets in our solar system.
From a philosophical and English rules perspective, this makes no sense. If I were to say there are 6 billion people on earth; 3 billion are men, 3 billion are women and 1 billion are big-breasted women, that would make no sense. Big-breasted women are not a different category from women; they are a subset. So too it is with any adjective-noun syntax, including planets.
The number of planets in our solar system should have gone up from 9 to 11; with 4 being inner planets, 4 being gas giants (or outer planets) and 3 of the 11 being dwarf planets. Why is it that dwarf planets are not considered to be a subset of planets?
[sub]Maybe I should of used another analogy, but this one was funniest.[/sub]

From a philosophical and English rules perspective, this makes no sense. If I were to say there are 6 billion people on earth; 3 billion are men, 3 billion are women and 1 billion are big-breasted women, that would make no sense. Big-breasted women are not a different category from women; they are a subset. So too it is with any adjective-noun syntax, including planets.
The number of planets in our solar system should have gone up from 9 to 11; with 4 being inner planets, 4 being gas giants (or outer planets) and 3 of the 11 being dwarf planets. Why is it that dwarf planets are not considered to be a subset of planets?
[sub]Maybe I should of used another analogy, but this one was funniest.[/sub]