Originally Posted by araytx
Personally I don't agree that's the criteria and therefore there is no "doubt goes to the player in this case. See my last paragraph below. The criteria is not "that the wind is able to move it;" the criteria is "it's no longer moving due to momentum imparted by the throw." Part of the momentum the thrower is imparting is the spin he/she puts on the disc to make it fly.
Maybe it's because I have a degree in science. There is no way the laws of physics say that even "the 550-ft roller" is moving ONLY due to the wind. That disc is moving due to the original momentum AND the wind. Many shots do that. Very likely in the roller case and in the case of bombmk's putt it's 80, 90, maybe even 95% due to the wind -- but not ONLY. Let's examine the examples he gave us. On bombmk's downhill example notice he said, "give it a 'slight nudge'." From his own words in the roller example, "it was about to die (meaning it hadn't 'died' yet) as the wind took it." Even in both of those examples the disc was moving due to momentum from the thrower AND wind. So, I do not find it problematic on the "letter of the rule" as currently written.
Now my other point is always one I bring up in rules debates. Every rule (and every law) has both a letter of law and a "spirit of the law". Maybe I'm wrong, but it layman's terms the intent to me is clear. The intent is "once a disc is observed to have stopped moving, then that's it -- it's stopped." I believe the RC worded it the best way possible to attempt to clarify it's intent.
I actually think its too scientific a term to use in the rules - phrased like that at least. It might be moving due to being thrown - but the 550 _meter_ roller is not in any way rolling due to the momentum the thrower put in it. If you throw disc up into the wind, any momentum you put on it is gone the moment it starts falling backwards. It is no longer moving due to the momentum that you put on it.
If I throw you a tennisball and you throw it up in the air and hit it with a racket, is it still flying through the air due to the momentum I put on it?
"A disc is at rest once it is no longer moving by its own momentum."
That should cover stopping on moving branches or water as well.
Not sure its bulletproof, so fire away.