I noticed that Vicarious and Right in Two seem to be related in the respect that they're addressing human nature from two different perspectives. Vicarious is individualistic and /shameless/ about human nature, while Right in Two is /ashamed/ of that nature and seems to be more wholistic, altruistic, objective. Well, I'm wondering if Jambi and Intension are another pair. I know they seem like an unlikely couple, but listen to the lyrics and take note of how each of them seems to be a personal hymn of sorts, a prayer, and that each one of them is dealing with the issues of corruption and selfishness, and longing for purity, simplicity, integrity, and for the phase in one's development when these evils are not present.

Also, 10,000 days and Rosetta Stoned are another pair. The tones are completely different, but each one is about religious faith/or in Rosetta's case, a religious experience, and paralysis or helplessness that afflicts the faithful, holding him/her back from divine fulfillment or appreciating the beauty of what they know.

10,000 days and Rosetta each have their intro tracks, but I honestly think Lost Keys was just kind of slapped together as an afterthought / or at least with less artistic craftsmanship / mainly for the sake of symmetry. The Pot and Lipan are the only remaining tracks, which suggests they're a pair--my only guesses so far are, since part of The Pot's subject is the USA, Native Americans are kind of like a haunting ghost or a reflection from the USA's past. Also, it sounds like whoever is doing this dance "must have been high."

Besides these, we're left only with Viginti Tres, which means 23 (the significance being that it's one of a pair), and that seems to be consistent with the concept of all of these pairings.