The question is how "rock falling to the ground" should be understood. Folks can agree on the real pattern, but not on the conceptions uses to understand that pattern or to relate it to an underlying worldview. And understanding the world isn't just a case of childish intellectual babbling.

https://medium.com/original-philosophy/how-understanding-the-facts-makes-all-knowledge-partly-subjective-bda98e29f990?sk=387e9e50b01927fbaae66014e5ed731a