https://cstheory.stackexchange.com/questions/32271/are-dpdas-without-a-epsilon-moves-as-powerful-as-dpdas-with-them
https://stackoverflow.com/questions/33000800/is-a-pushdown-automaton-with-an-epsilon-transition-a-ndpa
Clarity means deterministic bcs b is following a so no a can come after b or b can't come before a.. DPDA would be like