Based on the experiments I ran, I noticed that f(x) seems to be selective for certain concepts. Here is a description of the function based on the outputs I obtained:

[DESCRIPTION]: The function f(x) seems to be selective for the concept of transportation. It assigns higher values (closer to 1) to words that are associated with means of transportation, such as "car". Other words that are not directly related to transportation, like "apple", "book", "love", "tree", and "courage", receive lower values (closer to 0). Thus, the function seems to be focusing on the concept of transportation, but it is not exclusively selective for it.