Will the AI accept Refute Sacrifice?

Yes: it is accepted automatically.

Interaction · Religious actions

Refute Sacrifice

No costAccepted automatically

Stop the recipient from being your Chief Sacrifice at the upcoming festival

What you need

The character you target

Has the Modifier: Soon to be Sacrificed

Refute Sacrifice is a religious character interaction in Crusader Kings III. Accepted automatically. Patch 1.20.1.2, from game/common/character_interactions/01_fp1_interactions.txt.

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Quick answers (1)

Will the AI accept Refute Sacrifice?: Yes: it is accepted automatically.

Will they accept?

The other character has no choice: the game accepts it automatically.

What happens

Effects

The character you target:
- Loses “Soon to be Sacrificed”
- If
  scope:removal_type = flag:manual
  Then
  … has shown mercy
  Else if
  scope:removal_type = flag:override
  Then
  … has decided on a different sacrifice
  Otherwise
  The festival has been called off
If
- You: Government is Clan
- The character you target: Government is Clan
- Your house is the target’s
- If
  You are not the target
  Then
  You are not the target
Then
- Your house:
  add_unity_value = { … }
Else if
- No
- You: Government is Clan
- Your house: Has you as house head
- One of these
  All of these
  exists = scope:recipient.house
  Your house is not the target’s
  or
  The character you target: Is Lowborn
Then
- Your house:
  add_unity_value = { … }

• the game's own tooltip text · ◦ our reading of the script line · code the script where neither exists

Who can use it and sees it (is_available, is_shown) (6 lines of game script)

is_shown = scope:actor = {
	has_character_flag = gruesome_festivals_can_pick_human_sacrifice
}
scope:recipient = {
	has_character_modifier = gruesome_festivals_designated_sacrifice_fp1_modifier
}

As written in game/common/character_interactions/01_fp1_interactions.txt.

Effects (on_send, on_accept, on_decline) (16 lines of game script)

on_accept = scope:recipient = {
	save_scope_value_as = {
		name = removal_type
		value = flag:manual
	}
	designate_gruesome_festivals_sacrifice_modifier_removed_effect = {
		DESIGNATOR = scope:actor
	}
}
add_clan_unity_interaction_effect = {
	CHARACTER = scope:actor
	TARGET = scope:recipient
	VALUE = medium_unity_gain
	DESC = clan_unity_human_sacrifice_removal.desc
	REVERSE_NON_HOUSE_TARGET = no
}

As written in game/common/character_interactions/01_fp1_interactions.txt.

Category: Religious actions
In the menu: under More…
ID: remove_designated_gruesome_festivals_sacrifice_interaction

Source: game/common/character_interactions/01_fp1_interactions.txt and the English localisation, Crusader Kings III 1.20.1.2. “You” is the character who sends it (scope:actor, or a puppet acting for you); “the character you target” is the recipient.