One of the things that affects Dory from helping find Nemo faster is her short term memory loss. Right after you tell Dory something, she immediately forgets it so you always have to redirect her. She also gets distracted super easily.
Nemo's disability is he has a bad fin. How that effects his life in "Finding Nemo" is he cant swim as good as the other fish in the sea. and he gets picked on because of his disability but then the other kid fish share their disabilities. then he felt better.
Dory's disability is she has short term memory loss. How that effects her life in "Finding Nemo" is Marlin (Nemo's father) asks her if she saw a boat and she said she did and to follow her but then as they were swimming Dory forgot what she was doing and she thought that marlin was a creep following her.
Answer: The author's purpose was to express how Augustus felt after losing a friend to cancer as well as letting the world know that people with illnesses are capable of finding love.
