Information changes the question asked. You don't state the questions. Did you mean: neighbor has 2 children, we don't know the sex, what is the probability one

Information changes the question asked. You don't state the questions. Did you mean: neighbor has 2 children, we don't know the sex, what is the probability one or more is a girl? Next question is: neighbor has 1 child of unknown sex, odds of it being a girl? Are these not different questions?