It would be nice if participants arrived at the beginning of training with their minds open and receptive. Very few of them actually begin the learning event with the intention of deliberately tuning out the learning material, but too often this is what happens. They show up with their minds full of unfinished projects, issues, discussions, family, children, household projects, and emails and voicemails to return, or other things to do. It is a well-established fact that the mind can only hold one idea at a time (although the ideas can move through in rapid succession). Therefore, if learners are thinking about their jobs or their lives, they are not thinking about their training.