1. A method comprising: determining a context associated with an utterance received via a microphone that converts audible signals into electrical signals; determining, via a processor, phoneme possibilities for a unit of speech in the utterance; assigning weights to each phoneme possibility in the phoneme possibilities, to yield weighted phonemes, wherein the weights are based on a rate of occurrence of the phoneme possibility in utterances associated with the context and a likelihood of classification errors; receiving additional utterances via the microphone; and converting the additional utterances into text via a speech recognizer that uses the weighted phonemes.