In fact, a fourth resonance stabilized state exists in which three double bonds exist, and the CL atom has a negative charge. So we see that resonance stabilization is good. Whenever we have more resonance stabilization, that means we have a more stable conjugate base. So this guy will exist, and it will be more likely that it will exist than this guy. And therefore, chloride acid will be more likely to go this way to lose and dissociate and to form this state than this guy. This guy will be less likely to dissociate because it's only stabilized by two resonance stabilized states, or its conjugate base is only stabilized by two states versus four states in this case.