Redundancy and Leeches

I always recommend redundant items but it always makes me think like I used to think of remembering something as sort of a binary situation I remember that or I didn't right. Now I think you only remember things in certain context like what does it mean to remember something? It's possible to correctly answer an item and then not correctly answer when that situation comes up in real life if it doesn't match the context of the phrase. No I don't really study that stuff but I would say that the ones I looked at at least were definitely like quantity of quality. Yeah I don't know.