[Whit]

     Hmm, I don't know. I'd like to think that I'm more than blood and tissue, but I'm not sure that's a solid argument. When you consider how many facets a personality has, double it and then blend randomly an amazing variety could be produced.
     I have a friend that was adopted, in his mid-twenties he met his real mom. We were roommates at the time and I witnessed her making gestures and using body language I'd seen out of him for years. This was the first time they'd seen each other since the day he was born.
     My own Daughter has the same smartass tendencies that I, my father and my Grandfather have. As well as the tendency to not worry much about the affect of our words, also inherent in the family. Meanwhile, I keep my mouth in check around the girl-child and her mom actively discourages her sarcastic tendencies.
     Obviously, physical, mental and even emotional traits can be passed. Often times purely genetically, since even though they weren't taught they exist in the child.
     So, there has to be spirit because it's needed for variety? Hmm, no, I don't buy it due to the extreme diversity one individual can possess. I have a friend who's mom's a holy-roller now. When he was a teen she custom painted Harleys and lived a life appropriate to that job. Both persona's are sincere. One person can play many roles in their life. Two mixed? The mind boggles...