2. The system of claim 1 , wherein the decision circuit is configured to classify the utterance as understood or misunderstood when the accumulated probability of the set of predictions is at or above a threshold, and wherein the decision circuit is further configured to classify the utterance as not-understood when the accumulated probability of the set of predictions is below the threshold.
2. The system of claim 1 , wherein the decision circuit is configured to classify the utterance as understood or misunderstood when the accumulated probability of the set of predictions is at or above a threshold, and wherein the decision circuit is further configured to classify the utterance as not-understood when the accumulated probability of the set of predictions is below the threshold. 3. The system of claim 2 , further comprising a performance measurement circuit coupled to the decision circuit and configured to derive a Receiver Operating Curve (ROC) that graphs a false positive rate and a true positive rate, by varying the threshold, and wherein an area defined by the ROC represents a quantification of performance of the decision circuit in classifying the utterance.