The episode concludes with the realization that while the plan was logically "sound," it destroyed the very humanity the Survey Corps fought to protect. Attack on Titan - Season 4 Episode 10 - "A Sound Argument"
Set two years before the present-day conflict, the episode explores the introduction of foreign diplomacy to Paradis Island and the tragic weight placed on Queen Historia. The Visit from Hizuru 10 : A Sound Argument
: In a poignant flashback, Eren Jaeger vehemently refuses to let Historia be used as a "breeding tool". The episode concludes with the realization that while