Strange Children

Little Sister and DS Big Brother are playing some weird game between their bedrooms (day time is LS's room, night is BB's room)

BB: are you an owl or a bat this time?
LS: I'm a who-man
BB: ok, that's a mammal, you can come in
LS: what if I'd said I was a owl?
BB: I would have said that was ok because they an fly
LS: you are so incon-sis-tent
BB: you mean fickle
LS: no, I meant what I said and I said what I meant. 
BB: I thought you were a human?
LS: I am, but I can be like Horton too
BB: oh alright then. Now are you going to come in or not?
LS: not.