Difficulty with O8 concept from Zee's book

[Billy Baroo]

On page 190 of "High-Low-Split Poker for Advanced Players" Zee writes that you can play a lot of marginal hand from late position. The examples he gives are:
J [img]/images/graemlins/heart.gif[/img] T [img]/images/graemlins/club.gif[/img] 3 [img]/images/graemlins/club.gif[/img] 2 [img]/images/graemlins/heart.gif[/img]
A [img]/images/graemlins/spade.gif[/img] K [img]/images/graemlins/diamond.gif[/img] T [img]/images/graemlins/heart.gif[/img] 4 [img]/images/graemlins/spade.gif[/img]
J [img]/images/graemlins/club.gif[/img] J [img]/images/graemlins/diamond.gif[/img] 4 [img]/images/graemlins/diamond.gif[/img] 2 [img]/images/graemlins/spade.gif[/img]

OK, I understand the AKT4 hand because it can make the nuts with a flush or straight and back into a low, but I don't understand the other two. What's the gameplan with these sorts of hands? Are you trying to get into a shorthanded pot and semi-bluff weak tight players with your own marginal draws? That's my guess, but I really just don't get it.