Their suggestions have not been taken seriously by palaeontologists, as their evidence was largely based on misunderstandings of geology, and they never discussed the other feather-bearing specimens, which have increased in number since then.
Deras förslag har inte tagits på allvar av paleontologer då deras bevis baserades på okunnighet och missförstånd om geologi, och de diskuterade aldrig de andra fjäderbärande exemplaren som blivit allt fler sedan dess.