Researchers in the Kulik group at MIT are using generative artificial intelligence to predict the transition states of chemical reactions. One of these reactions is the endothermic rearrangement of a 5-membered aromatic ring into a 3-membered ring, which is predicted by their AI to have a transition state that also has a 3-membered ring. This prediction supports what hypothesis, stating that transition states of chemical reactions resemble the higher energy side of the reaction coordinate?