I posted here a questioni about erasing the text box on a card. I was given some answers, but not very satisfactory, as they do not point to specific parts of the rules or FAQ. So here it goes:

Renly's Courtier abbility reads (underlining mine): Any Phase: Kneel Renly's Courtier to choose a non-unique character. Until the end of the phase, treat that character as though its printed text box were blank (except for Traits).

And Milk of the Poppy says the following: Treat attached character as though its text box were blank (except for Traits).

So this hints that there is a difference between the printed text box and a text box not actually printed (where I suposse the gained abbilities of a card must be).

If that is so, when attaching Milk of the Poppy to a character card which already has a dupicate, can it prevent the character from being saved by discarding the duplicate?

The FAQ says the following about duplicates: (4.2) Using a duplicate to save a character from being killed or discarded is considered to be a gained triggered "Response:" action. Thus, it is treated as a triggered effect and may be canceled, but because it is gained (and therefore an ability of the card attempting to use the response), a character who is "immune to triggered effects" can be saved by using a duplicate, as a card cannot be immune to its own abbilities.

Someone told me that the response gained from having a duplicate is considered to exist on the duplicate card. However, this should imply that there is a way to target the duplicate cards because they are a separate thing from the main card, and not just a text addition.

Can anyone clear my thought on this?

FAQ page 8 (3.8):

Any effect that
blanks a card's text box is assumed to blank
that card's printed text box.

nikotina said:

Milk of the Poppy is a (persistent) reprint from the very first set of AGoT ever made, way back in like 2003. FFG has never updated the text on the reprint, despite evolution and improvements in the way they template abilities. Renly's Courtier is a much more recent card.

As per the FAQ entry Rogue quotes, whenever an effect blanks a card's text box, it is only considered to blank the printed text box - whether the effect says "printed text box" or simply "text box." So blanking effects only "take away" the actual ink on the card. While duplicates are considered "gained" abilities, blanking does not affect them because they do not add ink to the card.