I know, trivial, but it IS driving me nuts (and that's an example), this stilted emphasis on the off-beat adjective, that's like a bad rash. Inescapable on the tv and radio news, announcers, interviewers, interviewees. Some examples, I've heard in the last hour: We DO need to make sure... They DO anchor the.. I CAN tell you... (classic, really the epitome of sanctimonious talk-down) What DO you do when... Not all prisoners HAVE exhibited...
It's taught at Communications class I think. It's a way to wrap things up and summarise the story. e.g. big storm, heavy rain, mountain snow blah blah blah "That's right <news anchor>, drivers WILL have to take it slow in the morning and prepare for snow at higher elevations" or "shooter, location unknown, some casualties, police on scene" "What we DO know is that he's still on the loose and that people ARE advised to stay inside and lock all doors".
Don't ya just love the English and their idiosyncratic grammar. We get graded on knowing the intricacies of this at school. Yeah, right!