4. The method of claim 1 , wherein the detecting comprises detecting an in-grammar false accept (IGFA) type error if the grammar includes the transcribed version and the transcribed version is different from the recognized voice command.
4. The method of claim 1 , wherein the detecting comprises detecting an in-grammar false accept (IGFA) type error if the grammar includes the transcribed version and the transcribed version is different from the recognized voice command. 6. The method of claim 4 , further comprising: determining that the user utterance is acoustically similar to the recognized voice command if the IGFA type error is detected; adding to the grammar at least one acoustically different command synonymous with the user utterance if the grammar fails to include the at least one acoustically different command synonymous with the user utterance; and deleting the recognized voice command from the grammar if the grammar includes the at least one acoustically different command synonymous with the user utterance.