It’s often tempting to blame the audience when they don’t “get it.” Anyone who has ever tried to train the same people over and over again on the same topic will understand the feeling. But, despite Dilbert’s opinion, it’s always your job as the presenter to make sure that your material is appropriately targeted at your audience and that they are able to follow along with you. If they can’t, you’re not working hard enough to communicate clearly. Of course there’s no guarantee that they’ll agree with you, but you need to make sure that they at least understand you.