I believe that if David were a female robot instead, the story line would change slightly in some cases. For example: When Martins friends decide to test if David can feel pain they would have thought differently and the incident with the pool wouldn't have happened. Disagreements between David and Martin wouldn't occur as frequently and there would possibly less sibling rivalry, meaning David would not be taken to the forest.
2.David is unique because he possesses human qualities that other robots don't such as: love, dreaming, thinking, hate. Because of these qualities David believes he is unique and he is sometimes mistaken for a human boy.
3.David reflects human faith in the way he never gives up hope in search of the blue fairy even when he is told directly that she does not exist. The greatest human flaw is that we dream of things that we can't have but the greatest human gift is being able to dream. David shows this by believing in a fairytale and pursuing his dream in hope that it will become a reality.
4.Teddy is a voice of reason in AI. He is basically David's companion/buddy and follows him on all of his adventures because he is loyal to David and looks out for him. Joe is more of an adult friend because he is not as concerned as teddy is for David's safety but still offers a lot of advice and helps him.
5.Depending on which time period is based in I find AI to be one of the more believable futuristic movies because it takes into account things like global warming and it also features things that we use today in simple form. The only part of AI that is not quite credible is the ending but 2000 years ahead is very hard to predict what life will be like.
6.The fact remains that AI is a film that is meant to entertain us but it strangely makes you wonder about the future and the progress of mankind. It challenges our faith in humanity in a sense that really leaves you thinking about the world.