Question: Why do they use john doe and jane doe?
Answer: refer to an unidentified person
Disambiguated annotations:
qaPairs: question: Why do they use John Doe and Jane Doe instead of the person's real name?
answer: true name of a person is unknown or is being intentionally concealed
identity is unknown or unconfirmed
question: Why do they use John Doe and Jane Doe when talking about someone who isn't real?
answer: hypothetical "everyman"