I believe the suggestion is just for purposes of evaluation. You would not return these items in practice, yes.
Although there are cases where you do want to return known items. For example, maybe you are modeling user interaction with restaurant categories. This could be useful, because as soon as you see I interact with "Chinese" and "Indian" you may recommend "Thai"; it might even be a stronger recommendation than the two known categories. But I may not want to actually exclude Chinese and Indian from the list entirely. On Fri, Jun 7, 2013 at 10:36 PM, <simon.2.thomp...@bt.com> wrote: > But why would she want the things she has?
