Nobody can visually determine the size, distance, speed, or altitude of an object without at least one of the
following aids:
- The object comes within 20 feet of the witness, where binocular vision works.
- The witness moves several feet and establishes parallax while the object stands
still.
- The witness knows the identity of the object. But claiming it is a spaceship is NOT
knowing the identity of the object.
- The object casts a shadow at a known distance (and the position of the sun or other
light source is noted).
- The object gives off light that casts shadows (I wish I had shadow data on the
Exeter case).
- The witness knows one of the other values (listed above) accurately by other
means.
- The object passes in front of and behind other known objects.
UFOlogists raise the objection, "Air Force people can visually estimate the altitude, speed, and distance of
an airplane." The difference is that these people know that it is an airplane.
Likewise, you can easily estimate the distance of a streetlight, because you know it is a streetlight, and because
you can see where the post sticks into the ground. Since you do not know what the UFO is, you can't know its size.
Without knowledge of the size, you can't estimate the distance, altitude, or speed. Thus, you must mistrust all of
the following values given by witnesses (unless one of the above cases is true):
- Size, including length, diameter, height, and area.
- Distance from the observer.
- Description of what the object flew or hovered over, except to find the direction the object was seen in.
- Altitude.
- Speed.
- Radial motion (toward or away from observer).