I wouldn't want to contradict the Governor of the Bank of Canada on something as fundamental to his mandate as inflation.
On the other hand, I don't want to suggest what the governor could or should have done had there not been a carbon tax. It's clear that economic theory would have it that if the carbon tax had been eliminated or didn't exist, inflation would have been lower. Whether it would be 2.1%, 2.5%, 2.8% or 2.9% is debatable, but certainly lower inflation would probably mean that interest rates would come down sooner and maybe would have come down in April.
It's very hard to predict exactly what would have happened.