Which claim relies on insufficient evidence?
Responses

Mankind made several early failed attempts at flight.
Mankind made several early failed attempts at flight.

Kites use the same technology as planes to get off the ground.
Kites use the same technology as planes to get off the ground.

Greeks inspired engineers to create the first flight device.
Greeks inspired engineers to create the first flight device.

China created the first unmanned flight device.
China created the first unmanned flight device.