I don't think "practical" belongs there. Many good questions are about explaining a passage of Chumash or the like, which can scarcely be described as practical.
Moreover, we regularly close questions for being too practical. So putting "practical" as one of the three criteria of a "good question" is I think counterproductive.
And yes, I know SE literature suggests questions be practical. But that's a relic of when SE sites were practical, and it's been noted [citation needed] that that's not true of sites like MY.
