Submitted by Ray Cook -- November 15, 2001
Re: Technical Question (Turn thread, Van Zile et al, October 11, 2001)
The Basic problem is in not defining the words “Destination” and “Motion.”
Regardless of any dictionary wording, destination is a point (place) at which you arrive (this could be unknown or known). Motion is how one gets there, and not the condition of the body when the destination is reached.
This can be illustrated as follows:
Ex. 1 Motion without a stated destination.
Ex. 2 Motion with a stated destination.
Ex. 3 Motion without a stated destination.
Ex. 4 Motion -- known amount of motion, but not a definite destination. You need a starting point to know where the destination would be, as in Ex. 5).
Ex. 6 Motion to a known destination.
Ex. 7. Because an empty rotation sign in either direction gives motion plus an unknown destination, it follows that unit (a) in Ex. 7 indicates outward rotations with an unknown amount and therefore an unknown destination; and unit (b) indicates motion inward from an unknown destination to an unknown destination.