If the previous Divinity games are any indication, there will be dialogs with more than two options (and probably some with only one). It would be very unusual to limit the number of options that much, but have a dialog system where stats can influence what options are available. Also, talking about the editor, Lar said "As far as dialogs are concerned, that's pretty straightforward too, yet you can still pretty much do anything you can think of." Two options are appropriate for lots of game situations, but it isn't very hard to think of some where you could easily have 3 or more options.
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