Actually, no. I can actually was friends with an 18 intelligence 3 wisdom sort of person who was profoundly intelligent, but basically needed an adult caretaker to watch after him. I was just barely intelligent enough to understand him, and he found me just barely intelligent enough to not be threatening and mysterious.
Yeah. I actually pondered Rainman while writing and hoped no one would call me on it. But, as you say, he wasn't exactly functional. To the point about "medicine is an INT skill", would he have made an effective doctor, even one with a marginally less pleasant bedside manner than House? I would guess not. To actually
use either intelligence or wisdom, you need both. Again, game abstraction. you can argue the two aren't hard-linked, but they are for most intents, if you want to gain the benefit of the high score.
It's probably even more difficult to have a high effective wisdom with a remarkably low intelligence, barring the excuse of "instinct". Cunning and judgement are the application of knowledge. If you don't know that something is a hazard, it's very hard to have the wisdom to avoid it.
[/quote]And while I agree agility is interconnected with strength, dexterity is a far broader concept. It certainly not at all clear to me that anyone who is strong is necessarily agile or dexterous, and it's only slightly more convincing that high agility implies high strength to weight ratio. And in any event, since Mass is not an ability score (as it is in BRP/CoC) in D&D, it's not clear how we would accurately constrain the two anyway.[/QUOTE]
Definitely some good thoughts. I'm going to drop back to "abstraction" here, too. If we assume that gymnasts and dancers are marquee examples of high-dexterity individuals, we can also use them as examples of good musculature. That's not the same as saying they are heavily muscled or extremely strong. In D&D terms, they would have above average strengths, but probably not above, say, 13 as a very broad general rule.
I'll definitely agree, though, that a high strength is probably significantly less reliant on a high dexterity. There's a potential rabbit hole around dexterity giving you the ability to correctly position your body to apply your brute force, but I really don't want to go down that road. On occasion, an extremely high strength could even be a hindrance to dexterity, as you get the cliched muscled-bound tough that's too thick to turn his head. Without a Mass stat, as you mentioned, that really isn't clear.
Come to think of it, one could even say that dexterity is limited by low wisdom because you need sufficient perception to be able to have the good hand-eye-coordination that is part of dexterity.
Regardless of all the above, my point actually was this:
The D&D ability scores aren't quite as big of an abstraction as hit points, but they're still a pretty big abstraction. The real world is considerably more complex. While a system could be crafted to account for some of that complexity, it would quickly hit a point of diminishing returns (IMO) and probably isn't worth the effort. Personally, I'd rather leave the exact definitions of the ability scores a bit squishy and subject to interpretation. That way, my Rogue can be an amazing juggler, capable of catching almost anything thrown at him, but totally oblivious to social cues; but my Ranger excuses his high dexterity as being an effect of his incredible perception making him always prepared for action. Both have a high dexterity, and the game effects are identical. One acts quickly because of their body. The other because of their mind.