I guess it depends on what you mean by emotions. If you mean emotion as a state of consciousness then you would have to prove that consciousness is not an emergent property of matter and that CPU's don't have this property. Consciousness is hard to debate though since its pretty metaphysical in nature and there's no real argument against solipsism, so all argumentation starts with the axiom that all awake adult humans are conscious.
However, if you mean emotion as a stimuli, ie. a input to the brain net thats endogenous to the system(the human), then there's no question machines can achieve this, in fact the reasoning models already probably do this where different systems regulate each other.