No evidence for interstellar planetesimals trapped in the Solar system

@article{Morbidelli2020NoEF,
  title={No evidence for interstellar planetesimals trapped in the Solar system},
  author={Alessandro Morbidelli and Konstantin Batygin and Ramon Brasser and Sean N. Raymond},
  journal={Monthly Notices of the Royal Astronomical Society: Letters},
  year={2020}
}
In two recent papers published in MNRAS, Namouni and Morais claimed evidence for the interstellar origin of some small Solar system bodies, including: (i) objects in retrograde co-orbital motion with the giant planets and (ii) the highly inclined Centaurs. Here, we discuss the flaws of those papers that invalidate the authors’ conclusions. Numerical simulations backwards in time are not representative of the past evolution of real bodies. Instead, these simulations are only useful as a means… 
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