Elizabeth Preston summarizes a paper in Science Education:
Researchers at King’s College London gave a simple task to 232 people: “Draw a neuron.” […] Some of the subjects were undergraduates in a neurobiology lecture. A small group were experienced neuroscientists who led their own research labs at the college. And a third, in-between group included graduate students and postdocs.
The researchers saw marked differences in how the three groups drew their brain cells. To confirm what they saw, they also pooled the drawings together and asked a new batch of subjects to sort the drawings into categories. These subjects agreed: the drawings clustered into distinct styles.
Being comfortable with a scientific concept means being comfortable eliding the details unless and until they’re actually necessary.