One of my sources

Attached is a link to one of the articles I used for one oy my popular sources: http://news.discovery.com/human/health/sleep-seven-hours.htm

The articles talks about seven hours of sleep being the best amount of sleep for someone to get.  My take on this is that I now have a range to argue for being the best amount of sleep.  Granted this range is small being 7-8, but I feel as though it gives me flexibility in an arguement.  Think about it, some people that you argue with or have discussions with can get very specific and might try to stick with eight only. Now I feel as though I can argue that its not a bad thing if the amount of sleep you get is at least close to the range.