The function seems to associate certain words with a specific concept. 

- The words "driver", "Jews", "Jesus", "humidity", "borrow", and "borrowing" have very low associations with the concept, as indicated by the outputs being close to 0.

- The words "World Cup", "one third", and "helicopter" have moderate associations with the concept, as indicated by their outputs being between 0.001 and 0.1.

- The word "airplane" has a strong association with the concept, as indicated by its output being close to 1.

Based on these tests, it seems like the function is selective for the concept of "air travel". The word "airplane" consistently has a high output score, indicating it is strongly associated with the concept.