"Picks" as a Smart Playlist Criteria?

It would seem that when creating a smart playlist for tracks, ‘picks’ is not in the list of selection criteria. Is this by design or omission?

Omission. See:

If this is an omission, I would like to think that the resolution of the issue and the design would support a logical AND of ‘Picks’ and ‘Favorites’. It would appear now only to support an OR of these elements.

To my way of thinking anyway, an AND of these makes sense as there are many tracks which I have not marked as a Favorite and yet I would like to take advantage of the Picks designation in addition to my favorites.

It should generally support Boolean, vote for it