system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Spoiler Rogue One question.

Why was Grand Moff Tarkin so skeptical of Director Krennic's belief in the power/effectiveness of the Death Star? The Death Star's construction began years before 0 BBY under the eyes of both the Emperor and Darth Vader. If they weren't skeptical, why would Moff be?
gpt
It wasn't so much that Tarkin was skeptical.  It had more to do with him *appearing* to be skeptical in order to do political maneuvering in the background for his own benefit.  We see the fruition of his machinations when he orders the destruction of the Imperial base on Scarf.