Originally posted by Mako Ruu:

CDPR has stated dozens times in the past that every single situation in the game will have multiple outcomes.

Fail a dialog check - different outcome
Succeed a dialog check - different outcome
Choose a different dialog that doesn't require a check - different outcome.

This is going to be one of the greatest RPG's ever created. With probably hundreds of thousands of lines of dialog, thousands of ways to complete all the missions. The replay ability alone is going to be through the roof.