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<blockquote> <p>Is it possible for a top student with stellar EC's to just naively fill out the application and get accepted to HYPSM<<</p> </blockquote>
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<p>Yes.
It helps if they are from somewhere outside the NE corridor or CA, because that explains some of their naivete with the process, and provides geographic diversity. It helps if their high school provides a good profile to put the student's record into context at their school, and the school in context of those of the other applicants.</p>
<p>But, yes, people with no knowledge, and many people with no or minimal "gaming" are accepted. That is, people who are top students, and have stellar ECs. The "knowledge" is most important in the selection of schools to apply to - knowing how stiff the competition is, and what your chances really are and how to respond to those chances - strong safeties, apply to several matches that fit your profile, don't fall in love with any school.</p>