10 : A Sound Argument 〈WORKING — GUIDE〉

: The episode highlights the growing instability of Eren, who has grown cold and detached, alarming his closest friends, Mikasa and Armin.

If you are referring to the episode " A Sound Argument " (Season 4, Episode 10), it is a story centered on the heavy burden of duty and the erosion of hope.

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" 10 : A Sound Argument

: A small-scale display of the Wall Titans' power to deter world invasion.

The "sound argument" of the title refers to the cold logic that sacrificing one individual (Historia) is a necessary evil to save the nation. : The episode highlights the growing instability of

: In the present day, we see the tragic outcome. Historia is shown pregnant and despondent, seemingly having accepted a fate she never wanted.

: In a poignant flashback, Eren Jaeger vehemently refuses to let Historia be used as a "breeding tool". Attack on Titan - Season 4 Episode 10

: Paradis must spend 50 years modernizing their military to compete with the world.