Can be canceled a Response from an Agenda card?

By cgilmeanu, in 2. AGoT Rules Discussion

Hi. Can you please help me clarify this: Can be canceled a Response from an Agenda card? Thanks!

cgilmeanu said:

Hi. Can you please help me clarify this: Can be canceled a Response from an Agenda card? Thanks!

Agenda cards abilities can't be canceled. It's an outright ruling from the FAQ:

(4.11) Agenda Cards
Agenda cards are not considered to be in play. Further, the effects of an Agenda card cannot be canceled.

While the above is correct its important to point out that responses gained via an agenda that apply to something else CAN be cancelled (unless ive gotten hopelessly confused) Alliance for example may grant your opponents house card

' Marshalling: Kneel this card to (choose 1): draw 1 card or take 2 gold from the treasury to your gold pool.'

This could be cancelled by something like maester
Murenmure.

Also, an effect that would stop a player triggering an effect can stop them, although as agendas are not considered in play something like burning bridges will not interact with them, but Brienne of Tarth (PotS version) will stop your opponent being able to trigger the response of siege of winterfell. (Brienne is about the only card that i can think of that fits this category though)

Hope that helps.