Is Mark Carney allowed not to tell the truth in order to make consumers and companies feel more relaxed?

Sir in “Mark Carney’s risky revolution” July 31 with respect to “forward guidance” you write that “Mr Carney believes guidance can provide extra monetary stimulus at a time when interest rates are already ultra-low. Consumers and companies will feel more relaxed about borrowing if the central bank reassures them it does not intend to hike rates soon.”

That begs the question whether Mark Carney or any other Bank of England governor must tell the truth and only the truth, or is he really allowed bending the truth, in order to have consumers and companies feeling more relaxed?

Is that why they hired a Canadian?