Originally posted by One Eyed Jack
Gravitational strength diminishes with altitude. Didn't you learn anything in science class?
Once again, Jack scrambles madly trying to salvage his original mis-statement. Gravtitational strength diminishes with the distance from the center of mass of the body in question, but that's hardly the same thing as "diminishes with altitude". (It would be the same if the body in question were of uniform radius and density, or at least density that varied solely with radius, but that's certainly not the case here.)
But since Jack has already shown himself to be such a pedant when it comes to dictionary definitions, we have to note that he has consistently used the term "altitude" here, as opposed to "elevation" or "height above ground." "Altitude" is properly used to refer only to specific measurement - the height of a given object or location above a specified reference, in this case that reference almost always being mean sea level.
To see how this relates to Jack's very questionable original assertion - that time varies "with altitude" - consider the problem of an airliner flying at a constant altitude, say 31,000 feet MSL. Per Jack's original assertion, we would expect the passage of time aboard this airliner, assuming that it maintains a constant velocity, to remain steady, since its ALTITUDE is unvarying. However, if we are to believe Einstein, time varies with the position in a gravity well (due to the curvature of space/time by the origin of that well, typically a mass - and since Jack's apparently unable to connect these particular dots, this effect on time, under general relatively, is directly analogous to special relativity's case of time variations caused by relative velocity in a supposedly "flat" space, per special relativity.) Now, consider the following situations:
- The airliner, maintaining its constant altitude and velocity, flies over a mountain (say, Mt. Everest - we'll clear it with a bit to spare), or
- The airliner flies over an area of greater density (a mass concentration) within the Earth - again, while maintaining constant altitude.
I'm rather surprised, though, that Jack himself drags relativity into this, since the Einstein theories - which Jack apparently does not question - cause some very significant problems for the creationist/young Universe notions.