...
Person 1: "Goku has VAST senses! He would easily sense the Flash and beat him. Goku's senses are BEYOND those of the Flash."
Person 2: "That is too vague, Goku has trouble sensing someone with normal human ki, even if we assume the Flash has ki (which is not necessarily true), then since he uses the Speedforce for his powers and not ki, his ki would not be any greater than that of a normal human. Goku cannot sense beings too far away in space if he does not recognize their ki, and even if he does he still cannot sense them if they are too far away (he had to get King Kai's help to locate the new planet Namek, even though he knew what a Namekian ki signature felt like). Furthermore, he often loses track of his opponents when they move around him, and these opponents usually have ki's as large or larger than his. There's no way he'd sense the Flash, who only has normal human - equivalent ki, and is moving way faster than any DBZ character, and even if he did, he wouldn't be able to react in time to stop him."
Person 1: "You're chatting garbage! Goku has VAST senses! He can sense people light - years and dimensions away! He can easily sense the slow - ass Flash right in front of him!"
Person 2: "I already explained this to you, he has trouble sensing people even with strong, familiar ki's if they are too far away, and the dimension thing isn't really quantifiable, especially considering it was harder for him to sense the Nameks in his own dimension than it was to sense King Kai in the afterlife. Furthermore, he loses track of his enemies when they are moving fast around him, and they have very large ki's. He would never sense someone moving at FTL speed with only average human ki."
etc etc, this is our bit for Argumentum ad nauseum on the
Fallacy page, the second I heard "sensing people across dimensions" I remembered where I had read it lol.