The basic problem here is that when you set up conditions on a Next
button to take you to one of N possible dialogs, you have to set up
reverse conditions on the Back button of the N dialogs to take you
back to the appropriate dialog based on the condition.
As the number of dialogs and conditions you can go to grows, this
becomes cumbersome and at that point you might decide to duplicate the
dialogs for each possible path. Of course its a trade-off between
maintaining the complex transition conditions on all the Next and Back
buttons vs. simplifying the Next/Back logic at the expense of
duplicating the dialogs. So when you have to modify the dialogs, you
must modify the N copies of the dialog instead of the just one, but
you have simpler Next/Back logic to maintain.
--
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