I know that Edsger Dijkstra preferred to write his papers longhand:
http://www.cs.utexas.edu/users/EWD/ewd13xx/EWD1300.PDF
I was wondering if it would be possible to write a complex programming project in longhand on paper until everyone in the group signs off that it is bug free? Has anyone ever tested this? I am just curious what would happen. Thank you.