The origin of all human action is human nature: the human mammal with her species-specific specialization (compared to other mammals) as developed with evolution. The human brain (with its sophisticated neo-cortex) is an important aspect of this specialization, just as the biologically determined basic needs and developmental possibilities of our species.

This biological origin is unavoidable.

The main pedagogical question here is: do we want to overpower nature or do we respect it?

Dikkedeur adopts the biological origin as an unavoidable and versatile basic principle; is aware of the knowledge in this regard and shows to be respectful towards this human nature in the way she approaches children.