ronald bailey, correspondent for are reason magazine. and stanford law professor hank gre greeley. 23 and me is the most successful dna company, they look at over 200 diseases and conditions. it markets itself as the first step in the prevention and mitigation of a series of these diseases. so the question is why is the fda telling them not to market this product? >> well by marketing themselves as the first step in prevention of mitigation of -- disease, this they are a medical device. medical devices are regulated. we want to make sure they're accurate, that they do a good job and they're also regulated because we want to make sure that the people using them are going to understand the results and act on them appropriately. those are two concerns that i think the fda legitimately has with 23 and me. >> the fda says the company hasn't proven the devices to be accurate or reliable enough to get their approval at least not yet. ron what do you say about that? what kind of accuracy have these kits had? >> first of all, hank is right. the f