What if an inhibitory neuron is inhibiting another inhibitory neuron?

This question was highlighted in one of the lectures my pharmacology teacher delivered regarding dopamine. Thinking deeper into this concept of an inhibitory neuron possibly inhibiting another of its kind, I almost feel like ... if this is the case, then what if a lot of the discoveries have been rather misunderstood in some way? Well, if the above is the case..can you add a comment below to further elaborate your thoughts ...