Do you agree with the following quote about the classifications of UFOs and so-called "slip flow"?

UFOs:

“Anything, to be surely classed as a UFO, must meet one of two criteria. Either it has to be seen from a sufficiently short distance to be certain that its configuration is not that of any conventional craft, or its speed, acceleration, or maneuver performance has to be such that no airplane, helicopter, missile, or balloon could possibly account for it. For example, if something goes faster than an airplane, and the same craft slows to a hovering condition, it is a UFO. Even if it goes only 500 mph and also hovers, it is probably a UFO because helicopters can’t go 500 mph. These statements say that range-of-speed capability is more important in the identification of an unconventional object than high speed itself. These criteria tend to eliminate from serious consideration as UFOs meteors as well as objects which are only seen moving slowly at high altitude, especially balloons. It need not eliminate unidentified (usually nonorbiting) objects seen in space by astronomical telescopes, of which there have been a fair number of sightings. These have to be natural objects or spacecraft. Several of the half-dozen or more unidentifieds sighted in space by U.S. astronauts pass the performance criteria; maneuvering in space, or going in a westward orbit as was the green object seen by Gordon Cooper near Perth, Australia, is evidence of superior performance sufficient enough to identify them as unconventional (space) craft, or UFOs.”

Slip flow:

“No discussion of the relief from aerodynamic heating would be complete without some consideration of a phenomenon known as slip flow. According to theory, the air-friction drag and heating of moving vehicles is due to the fact that air molecules cling to any surface; that they cling in clumps, making the surface somewhat rough, makes matters worse. That is why it does no good to polish an aerodynamic surface beyond the point at which the surface proper is smoother than the adsorbed layer of air molecules with its clumps. The clumps contribute to air drag in this manner. A fastmoving air molecule strikes a clump and is stopped, giving up its momentum and kinetic energy. This gives drag plus heating. Molecules leave clumps in random directions, giving no drag alleviation. This process is analogous to diffuse reflection in lighting. Laboratory wind tunnel tests showed that at a combination of low enough pressure and high enough speed and temperature, much of the adsorbed layer of air is knocked off the surface. In this condition the fast moving air molecules can bounce on a smooth surface and reflect off again without losing much energy, in a process analogous to the specular reflection of light from a mirror surface. This desirable operating condition, in which drag and heating are dramatically reduced, is known as slip flow.”

Source: Unconventional Flying Objects” by Paul Hill