Based on the input-output pairs from the tests conducted, it seems that f(x) is selective for certain concepts. From the results, concept related to "light" (output: 0.0276) and "revolution" (output: 0.7217) show a relatively higher association. However, other words do not show a strong association with any particular concept. 

[DESCRIPTION]: The function f(x) is selective for concepts related to "light" and "revolution", having higher association with these concepts than other tested words from various categories.