I checked a lot of the options because they were kind of silly. 20 or more weapons? Well, 20 or more weapons exist, so D&D should have them. Ok.
Of the substantive options, I selected Classes, Levels, and Monsters. That's... about it. Its not that I think that any game that has classes, levels, and monsters is D&D. Those aren't sufficient conditions. But they're the only necessary conditions. If you took 3.5, and kept every single thing in that list except one, it would still be D&D unless the thing you dropped was classes, levels, or monsters.
Of the substantive options, I selected Classes, Levels, and Monsters. That's... about it. Its not that I think that any game that has classes, levels, and monsters is D&D. Those aren't sufficient conditions. But they're the only necessary conditions. If you took 3.5, and kept every single thing in that list except one, it would still be D&D unless the thing you dropped was classes, levels, or monsters.
