But it's been done to some extent. Here's an ongoing human project - twins with conjoined brain(s): http://www.nytimes.com/2011/05/29/magazine/could-conjoined-

But it's been done to some extent. Here's an ongoing human project - twins with conjoined brain(s): http://www.nytimes.com/2011/05/29/magazine/could-conjoined-twins-share-a-mind.html?pagewanted=all&_r=0 http://www.nytimes.com/2011/05/29/magazine/could-conjoined-t... Tickle one and both know it. There's some discussion of shared personality also. In the end, They're just kids, with a little more sharing than others: http://www.google.com/search?q=Krista+and+Tatiana+Hogan&btnG=Search&client=ie&rls=en&oe=utf-8&channel=suggest&um=1&hl=en&tbm=isch&tab=wi&biw=1022&bih=580&sei=drAvUYeMA8fKrQHSqICYCQ&gbv=2 http://www.google.com/search?q=Krista+and+Tatiana+Hogan&...