The question of whether time is in fact directional is far from being closed, at least for quantum physicists. In fact, one of the physicists cited in the artic

The question of whether time is in fact directional is far from being closed, at least for quantum physicists. In fact, one of the physicists cited in the article is known for proposing a time-symmetric formulation of Quantum Mechanics [1]. [1] http://www.phy.bris.ac.uk/people/Popescu_S/papers/sandu_others5.pdf http://www.phy.bris.ac.uk/people/Popescu_S/papers/sandu_othe...