[…] the child is not supposed to know the bioprogram language from birth-whatever that might mean-any more than we would suppose that a child at birth, or even at six months, “knows” how to walk. Rather, the bioprogram language would unfold, just as a physical bioprogram unfolds; the language would grow just as the body grows, presenting the appropriate structures at the appropriate times and in the appropriate, pre-programmed sequences […].
- Bickerton (1981), a pag.134-135

The bioprogram language would constitute a core structure for human language.
- Bickerton (1981), a pag.297