  The interface between quantum theory and gravity represents still uncharted
territory. Recently, some works suggested promising alternative approaches
aimed at witnessing quantum features to test the fundamental nature of gravity
in tabletop experiments: Two masses in an initial superposition of spatially
localized states are allowed to interact only through gravity and it is
measured whether the final state is entangled. Here we show that one can
generate the same amount of entanglement in this setup by using classical time
evolution given by Newton's laws of motion. We argue that theories of quantum
gravity that can be approximated by the Newtonian potential and classical time
evolution given by Newton's laws of motion will generate gravity-mediated
entanglement.
