JesBelle wrote:
I just eat one.
I agree.  I saw this thing about wrinkling beans meaning they're done many years ago, and I thought "why?"  Just chew on one!  Then, trying to dispute it (naturally!), I started blowing on beans every 5 minutes, long before they were done, and, sure enough, one wrinkled when there was just a hint of crunchiness in the middle.  Still had another 10 or 15 minutes to go. (had to be when I was in college eating all those beans, and trying to dispute everything!).