Yes- 100% Earthling, through and through
Kind of - 80% Earthling, but an ancestor was from Venus. Oops :(
Pretty much - 60% Earthling, but abducted as a small child and returned after certain 'ttesting' was carried out
Not even half - 40% Earthling, my mother/father crash landed, morphed into a human, and married my other parent, who still knows nothing. I only know because I found the spacecraft in the garage.
Born here - 20% Earthling, both parents were from an Intergalactic Crusie Ship flying from Ajfp0fws in another universe when it struck a space iceberg and sunk. They parachuted to earth, turned into human figures and took up human lives. Still, I was born here.
Not at all - 0% Earthling, Parents from Quetzecoatl88hfsafswv and born on Neptune during the Ghfigawe school holidays. Came to Earth seeking Asylum from an Intergalactic war, but liked it so much I decided to stay.