In front of you stands a person. They are of your age, your ethnicity, and your gender. You don't know them very well but you've seen them around; they look to be at least fairly normal with regards to intelligence, social skills and sporting ability. They seem to be generally well-rounded. No massively apparently obvious flaws, no massively apparently obvious strengths. But there may be some less obvious ones, or some which you've not seen yet.
If it was possible, would you switch lives with this person?
Another question - in front of you stands a person. They are of your age, ethnicity and gender. You've never seen them before and have no idea about who they are or what they're like. Does your answer change?
And one final one! In front of you stands a person. They are of your age, ethnicity and gender. You know them very well; they're of average ability in more or less everything and they have nothing to hide. You know this to be a fact. Well-rounded, but neither outstanding nor flawed in any way. How about now?
...okay I lied. Last one, I promise. You have been told that there is a person who is above average in most respects, and you know this for a fact. However, you've never seen this person before; you have no idea of their age, gender, ethnicity or location. Will you switch lives with them?