Archaeopteryx are regarded as the amongst the most first undeniable example of the origin of flight. If you deny that, then you shouldn't patronize because you are in denial of historical facts. The other paleontologist arguments are "from the trees down" or "from the ground up." Short wings and feathers were already present in early Dromeosaurs and Caudipteryx, but not the lateral and downward-forward motion of their of their arms that allowed for lift, like Archaeopterx had. To date there is no known earlier bird than the Archaeopteryx. So where do we go from here? Pterosaurs were gliders. State your facts and cite your sources.