I found a lot of sandwich related emails in my archives that seemed to start in about 2004, but I think that was more exploration and less questioning? 2009 feels right, I know I was PRETTY ANNOYING with instigating that for a long time. :)
I know that the first time I heard of it was in 2009. We were at Juniors--me, Gary, Mike, Steve, and Adam. We were starting to plan our wedding, and Mike totally derailed it into this crazy sandwich thing that turned into a huge yelling match. That was the first I heard it, but it also seemed like something that even at that point had already been around for awhile--because Steve was like "oh boy, here we go again," basically.
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I also enjoyed all the DRY SODA jokes.
U BASTARDS
"i'm opening a can of worms cause our own KmikeyM has hosted this debate often in the past few years and its proven to be fairly contentious!"
Any ideas?
And actually I don't think Gary was there
http://xkcd.com/1572/
calzone is a classic maneuver when you teach the sandwich exercise to college freshmen
Cool survey though.