And in hope of clarifying for those still confused over why the answer to the other question—“is your eldest/youngest child a boy”—is different: if you get a ‘yes’ to this question you eliminate the fact that having a boy and a girl could mean both that the boy was born first (B+G) and that the girl was born first (G+B). Only one of those will remain, together with B+B.
And in hope of clarifying for those still confused over why the answer to the other question—“is your eldest/youngest child a boy”—is different: if you get a ‘yes’ to this question you eliminate the fact that having a boy and a girl could mean both that the boy was born first (B+G) and that the girl was born first (G+B). Only one of those will remain, together with B+B.