The function f(x) seems to be selective for concepts related to algorithms. It returns values closer to 1 for words like "algorithms" and words that are likely related to the field of algorithms. The function is less selective for other concepts, as indicated by the lower values it returns for words like "bus", "snowboarding", "factory", "spiders", "excavation", "Buckingham Palace", "suspension", and "Dublin". However, it is worth noting that there is a slight variation in the values returned for similar inputs, such as "excavation" and "Dublin". 

Overall, the function f(x) exhibits specificity for the concept of algorithms, but it may also have some level of association with other concepts, albeit to a lesser degree.