Based on the outputs for the given inputs, it seems that the function f(x) assigns a low value between 0 and 0.01 to each word. This suggests that the function might not be selective for any particular concept.

To confirm this, let's run the function with some more inputs.

COMMAND: PYTHON(./temp0/function.py table chair book elephant)

Response: Function input - output pairs: (table, 0.0031) (chair, 0.0027) (book, 0.0023) (elephant, 0.0008)

Based on these results, it seems that the function f(x) continues to assign relatively low values to various inputs, regardless of their category or concreteness. It does not exhibit a strong association with any specific concept.

Therefore, the preliminary description of the function f(x) would be:
[DESCRIPTION]: The function f(x) assigns low values between 0 and 0.01 to different word inputs, without showing a strong association with any particular concept.