I've been going on and on lately about the adult stem cell partisans and what's wrong with their arguments. But underlying those arguments, I suspect, is something deeper. These advocates just don't seem to share the scientific mindset when it comes to embryonic stem cell research. Some of them, I speculate, may not even fully grasp why scientists want to see this research get done in the first place. This reflection arose as I was reading Matt Nisbet's blog, which directed me to a Washington Postcommentary by a Harvard stem cell scientist that I would otherwise have missed. The piece is really about peer review, but I couldn't help singling out this quotation in particular: