I know I wouldn't know that just from watching the tape. The author, however, seems to know. I think this is some insight into his background: "... concepts from the old Jeff Tedford Cal offense that I picked up back in the day," Tedford was the head coach at California from 2002 thru 2012 and the article is posted on Cal's site. Just connecting the dots it appears that the author learned stuff from Tedford. (Note: Goff played at California 2013 thru 2015)
Unfortunately the author only identifies himself as HydroTech so I can't research his credentials.
Bottom line, though, even if HydroTech doesn't know what he's talking about the fact remains that we as fans still don't know. We see Cooks is open. Is he a decoy? Is the the 4th receiver in the progression. We don't know ... so it seems to me that criticizing Goff for 'missing a wide open Cooks' is an uninformed opinion.
AlbaNY_Ram