[DESCRIPTION]: The function f(x) appears to be selective for mathematical concepts. It assigns high values close to 1 for mathematical terms such as "algebra", "geometry", "calculus", "theorem", "integration", "probability", "derivative", "matrix", and "addition". In contrast, non-mathematical terms such as animals, food, sports, literature, or everyday objects yield values closer to 0, indicating a weaker association with the concept represented by the function.