So what does /sci/ think, are Newtonian forces real, symmetrical and non-causal relations? Or is this view too anti-Humean to the extent that it defends the existence of forces as external relations irreducible to spatio-temporal ones?
This is sci, not philosophy. Sci only cares of the model works and predicts things. Metaphysics is a branch of philosophy that is basically untestable.While metaphysics is semi-import, particularly to early physics, most 'metaphysics' of our time has to to with attempting to map mathematical assertions into the quantum world.