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From the first Matrix movie:

Oracle: Do you know what that means?
[points to a banner]
Oracle: It means know thy self. I wanna tell you a little secret, being the one is just like being in love. No one needs to tell you you are in love, you just know it, through and through. Balls to bone.

Then you get this little tidbit from Reloaded:

The Architect: There are two doors. The door to your right leads to the Source and the salvation of Zion. The door to your left leads back to the Matrix, to her... and to the end of your species. As you adequately put, the problem is choice. But we already know what you are going to do, don't we? Already I can see the chain reaction: the chemical precursors that signal the onset of an emotion, designed specifically to overwhelm logic and reason. An emotion that is already blinding you to the simple and obvious truth: she is going to die and there is nothing you can do to stop it.

So then, the Architect could tell that Neo was in love. Wait...
I dunno, I'm tired, and someone misquoted the Oracle as saying "No one CAN tell you you're in love." If that's the right answer, then I guess Neo isn't in love... I gotta go back and watch those again, obviously.

Edit: A little more digging, a little more tired:

* Tank - A tank is a type of heavy vehicle. (Cf. the name of his brother, Dozer). Also a subtle reference to the "tanks" the humans are kept in at the power plant towers.

* Dozer - A bulldozer is another type of heavy vehicle. "Dozer", meaning "sleeper" could also be seen as connotating the "sleeping" state of those jacked into the Matrix (although Dozer himself was Zion-born).