There is another element alluded to in the article, which is to communicate uncertainty of outcomes.
There is a large segment of the population - and I'm assuming the size can vary by country - who do not deal well with uncertainty and will latch onto a person giving a clear and uncertain message, even if factually incorrect.
There is a large segment of the population - and I'm assuming the size can vary by country - who do not deal well with uncertainty and will latch onto a person giving a clear and uncertain message, even if factually incorrect.