So , um , if you looked  if you were doing some coarse clustering , you probably would put those two sounds together. And yet , I would gue I would guess that many of your recognition errors were coming from , uh , um , pfft ,  screwing up on this distinction.
Mm - hmm.
So , in fact , it 's a little hard because recognizers , to first order , sort of work. And the reasons we 're doing the things we 're doing is because they don't work as well as we 'd like. And since they sort of work , uh , it means that they are already doing  if you go and take any recognizer that 's already out there and you say , " how well is it distinguishing between  schwas and stops ? "
Mm - hmm.