It was 50% instead of what I said.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC300793/
It's more akin to what we discuss in graduate chemistry seminars. We discuss material there that is always in a state of flux and so as grad students, we're taught a lot more about how to test hypotheses rather than raw material (i.e. growing a crystal, measuring KIE/isotopic perturbations, etc.). I guess in medical school you need both - the raw understanding but also the skills to analyze data. Very little of what we teach in undergrad chemistry will be disproven anytime soon. That's because you could go back thirty years and gen chem would have been taught the same way, with much of the same things we teach today. The classical organic syntheses have been known for a very long time - some for over a hundred years. In contrast, what we're taught in graduate courses is more relevant to the field today - akin to much of what is presumably learned in medical school. As such, many of these hypotheses are still being tested and re-made. That's all I was trying to say.