@PurpleTitan (re #34): I’m not entirely sure I entirely agree. One can feel that an undergraduate’s ONLY requirement is to study/learn. However, I believe that college students are additionally – and crucially – peer teachers. They learn from – but they also teach – classmates (and, occasionally, faculty/staff) in both the academic/intellectual and the “maturing into full/adult life” rheims. We all have innumerable experiences with this, ranging from “how does sum of the years’ digits depreciation work?” (academic), to “should Congressional term-limits be mandatory?” (intellectual/bull session), and even to “I’ve never rented a car, what do I do when I arrive at the airport?” (real-world).
Let’s presume that we have an absolutely brilliant young academic, but one who is SO introverted and socially awkward that s/he can never deal successfully with – no less teach (as outlined above) – classmates. Is this sufficient reason for admissions denial, due to a pervasive inability to fulfill the “teaching” element of the undergraduate’s implied obligation? Cleary, it is – and it should be – at some outstanding institutions, such as the Federal military academies, because commissioned officers MUST be able to communicate and to deal effectively with all sorts of individuals (I acknowledge, however, that the academies are atypical).
Similarly, the most charming, charismatic, personable, and vivacious young leader will necessarily be denied, if s/he simply is unable to meet required undergraduate academic/intellectual demands – regardless of “peer teaching/leadership” potential.
This returns me to my disagreement with your “50/50 percent” approach, which would REQUIRE the 2400 SAT I, 4.0 u/w GPA, uber intellectual – but horribly shy and reticent – candidate to be admitted. Doesn’t s/he have minimum responsibilities for classmates’ education (in the broadest sense), for participation in university-life (beyond silence in the library and the lecture hall), and for interface with faculty?
For these reasons, I strongly advocate a MANDATORY MIX – where every applicant must demonstrate minimum levels of BOTH general aptitudes. Many, of course, will have a true forte in only one arena, but ALL must be acceptable in both realms.