I went to Caltech in the 70's. Caltech did a pretty good job of only admitting people who could hack the program. But they did make mistakes here and there, and those would suffer the humiliation of flunking out. This did nobody any good.

BTW, I found out years later that they took a chance on admitting me, and I very nearly flunked out my freshman year before I found my "sea legs". I was rejected by MIT, Harvard, and Stanford.