Agreed. It just looks a bit strange and doesn't help to instil confidence in the paper. My first guess would be that they've used a reverser for the learning pr

Agreed. It just looks a bit strange and doesn't help to instil confidence in the paper. My first guess would be that they've used a reverser for the learning process somehow. As it's a preprint, hopefully comments like this will help them to strengthen the paper and release their code!