An envelope <a href="http://www.rethinkingmedia.nl/lectin-shield-dosage-2222.pdf#wound">lectin shield</a>  Since I write for people who Tweet and I Tweet, I tend to think that the entire universe revolves around the application, speaks its language, and assimilates its collective wisdom. Not true. Twitter contributed marginally to our understanding of the plane crash, if at all. Now, I'll still use it, and I'll still Tweet during emergencies, because that's one of the least torturous things that I've found I can do with my life. But all the same, I'll put what I'm doing in more perspective.