The Flash, Season 4

DeVoe:
Every event occurred exactly as I predicted. Except the outcome!!

Marlize:
You were supposed to defeat Siren-X.

DeVoe:
No. The Flash was, but... Barry Allen just stood there, frozen. And now, I've lost my only nuclear meta. Because the Flash failed! Why? Why did he fail?

Marlize:
Perhaps there were variables that we just didn't consider.

DeVoe:
As I already explained, there is no variable beyond my examination.

Marlize:
Even less apparent. The last time Barry Allen saw you, you took the life of his close friend. And now he sees you, and he pauses. You really don't see it. You can calculate near-infinite outcomes across multiple Earths, but you cannot account for how someone is feeling.