Regarding which slug a "good slug" is married into, it seems like that information would be very good, but not necessary to gain an advantage. For example, in card counting, we know that on average, those high cards are distributed in the rest of the shoe. To do ST, we can guess that on average, that "good slug" will be married with an almost neutral slug. Sometimes it may be married with a low slug, but (almost) just as many times it will be married with a high slug. So again, while the extra information from which slug it's married to will give you twice the information, it doesn't seem necessary to gain an advantage. Thoughts?