The function f(x) appears to be selective for various concepts. It assigns low values to words like "travel" and "organs", indicating a weak association. It assigns moderate values to words/phrases like "The New York Times", "green", and "syntax", suggesting a moderate association. It assigns higher values to words like "helmet", "CPU", and "Bitcoin", indicating a stronger association. However, the function assigns very high values to percentages like "83%" and "55%", suggesting a very strong association with these inputs.