Hi,

Actually Gareth did know about the viewing, Siuan told him about it when they were rescuing Egwene from the Tower.  However they both thought that it had been resolved then.

But you're right, this foretelling doesn't direct events, although it allows Siuan a (semi) informed decision when choosing to rescue Mat.  Another example would be Elaidas viewing of the Black Tower or Rand facing the Amrylins anger.  All of the decisions had already been made that affected this - Elaida had already directed troops to attack the Black Tower, boxed Rand etc.

Thanks for commenting

Thanks Jason, Brent and DM staff in general!