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#1
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Re: Ruling on Robonauts Balance
Since we also balance on the edge of the bridge rail with 20" of our 33" width protruding off the bridge, but in a way that does not grasp grapple or grip the edge rail, I will offer my assessment of why 118' scheme was disallowed.
The device that they engage the bridge with clearly relies on the cantilevered weight of the bot to effectively hook, pinch, grip, squeeze, grasp, and clamp on to the edge rail of the bridge. Functionally. their device initiates rail contact via multiple opposing points of contact on the mechanism, and the subsequent torque developed, as the cantilevered weight of the bot transfers onto the mechanism causes the mechanism to rotate around the length axis of the rail, so as to twist the device downward and away from the bridge, and this mechanism rotation results in a net pinching effect on the thickness of the rail's aluminum. The problem with the 118 design results from the way that the multiple opposing points of contact react against the rail to produce a net compression of the opposite sides of the rail. This seems to be exactly what the GDC and their rule wording would not allow. If I place a C-clamp over the bridge rail, but then I stop tightening it right before it contacts the rail, at which point, I then apply all my weight to the C-clamp, the resulting torque on the C-clamp will make it grip the rail. Just because the C-clamp was not initially squeezing the rail before the weight was applied does nor mean that the C-clamp is not gripping the rail after the weight is applied. Now if the 118 bot relied on another bot to move the bridge upward in order to lift them off the ground, then I would consider this a possible allowed exception, since the 118 bot is not manipulating any device against the bridge, and the grasping result is just incidental to the motion of the bridge, which they did not cause. Still a stretch though, since grasping engagement was the desired result of how the bot was positioned relative to the bridge. -Dick Ledford |
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#2
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Re: Ruling on Robonauts Balance
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#3
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Re: Ruling on Robonauts Balance
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Does it matter whether the process is good or not? It is widely used and an appropriate analogy. I know this from vast experience with such things. Are you implying that a competitive bid process is always a bad thing? May I ask what life experiences lead you to make such a statement? Quote:
The idyllic world to which you refer does not exist. I wish that it did. |
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#4
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Re: Ruling on Robonauts Balance
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And yes, process is important. Even if you get the right principal result from a process, its side effects and externalities can still make it a bad process. Quote:
As for the bidding process, the law recognizes that entitlement exists there too. Things you could do—but don't for practical reasons—don't diminish the remedy to which you're entitled.1 They just make it less likely you'll ever collect it. That can actually be a good thing, if as you note, it means that you avoid a reputation for complaining, and therefore get more business. On the other hand, it can mean that you acquire a reputation as a pushover, and get all the business you can manage, at a grossly inadequate rate. Quote:
1 I'm going to leave estoppel, laches and other equitable doctrines out of it; basically, in the English common law system that we're familiar with, if you're operating in good faith and satisfying your own obligations, this is true. |
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#5
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Re: Ruling on Robonauts Balance
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Hyperbole doesn't help your argument. Quote:
I'll stop you there. We are specifically instructed not to lawyer the rules. Talking about how judges define legal tests is directly contrary to what you're supposed to be doing when you look at these game rules. (And besides, if you're going to drag judicial practice into this, Potter Stewart's "I know it when I see it" is a much better analogy to the "reasonably astute observer" test.) Quote:
I mean, I suppose you could read it that way, but I can't for the life of me imagine why anyone would do so, as doing so would render the rule so subjective as to be meaningless (and thus it cannot possibly be the intent of the GDC). This, by the way, falls right into the positivist trap. I can just imagine the question to the Q&A: "When you say 'a reasonably astute observer', what do you mean by 'a'? Does it mean any reasonably astute observer, a particular reasonably astute observer, or an observer that is considered by the team or the person themselves to be reasonably astute? Also, in assessing observers, what is the difference between reasonably astute and unreasonably astute (or reasonably unastute?)" Reading requires interpretation; finding the correct interpretation means asking yourself, "what does the author most likely mean in this case?" I have a hard time believing that anyone would read "reasonably astute observer" as used in FRC documentation and come to any conclusion other than a generic layman observing the relevant phenomenon. Quote:
Last edited by pfreivald : 04-03-2012 at 23:10. |
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#6
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Re: Ruling on Robonauts Balance
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The bumper colour one is an example of good use of the term. It's not very ambiguous at all. As far as I can tell, any reasonably astute observer is probably going to understand this in one way only. (Well, apart from visual impairments, I guess.) The vision target one is not. Is the standard met when the observer thinks it's similar, or when they think a camera will perceive it similarly? Does the observer's impression of mimicry depend on whether they understand how a shape-tracking algorithm works? What about intent? What is the practical consequence of uncertainty and misinterpretation? These are things that can easily be specified, to guide teams and officials. The bumper end questions are also open to interpretation. Which parts of which faces constitute the ends? And what about soft parts of the bumper? If FIRST is trying to be permissive, they need to try harder—even after the clarification, they left people guessing as to whether FIRST missed the point of the question (and thus could have meant that a reasonably astute observer would obviously decide that the end face was the "end"), or was trying to cut teams some slack (anything remotely near to the end, on any surface). Again, this would be easy to specify, either numerically/geometrically, or as a functional test for inspectors to perform. (This is also annoying because it's a largely useless requirement.) And we've already discussed grasp/grab/grapple. Quote:
In other words, by observing the interpretation of one of these things, are you sufficiently informed about how the interpretation of the others will proceed? I think not, because the details are so different, and the people responsible for making the calls cannot help but be inconsistent. (Also, 118 would be disappointed at your implicit characterization of them, I'm certain.) Quote:
Even if FIRST did not intend for us to be talking about the law, one can't help but draw the obvious parallels. Those parallels don't just go away, because some members of the GDC are repulsed by the notion of people acting like lawyers. (Incidentally, "I know it when I see it" isn't a test for obscenity; it's preceded by an apologetic statement that a good definition of such a test escaped Justice Stewart, and that in that case, he was relying on his own instinctual reaction rather than a formal set of criteria. And like "reasonably astute observer", it's inherently subjective and ambiguous. One might ask, fruitlessly: 'Will Stewart think this other, similar movie is obscene?' That problem of ambiguity is precisely why the Miller test exists.) Besides, if we're supposed to analyze this in the manner of an engineer, without resorting to law, don't you think that precision is a hallmark of that profession as well? Shouldn't we be talking about dimensions and tolerances when it comes to the bumper ends, and functional tests and specifications when it comes to the vision? A thoughtful engineer might even include the Pantone number of the FIRST logo colours, just to avoid questions about whether we were supposed to approximate the version with the light background, or the one with the dark background. As for grasping, an engineer might distill it down to a discussion of force and contact, or explain whether the true objective of the specification is to limit field damage. At the very least, an engineer should be prepared to discuss things in these terms, if questions arise about the initial open-ended specification. Why then do we get a test that looks like none of the above, and instead looks like a snippet of legalese? Quote:
Another possibility: a team might agree that all of the referees at the field are reasonably astute observers, and that it is the referees that conference at the end of some matches to discuss rulings. So, if it was a violation in any of their opinions (i.e. the action was inappropriate to "a reasonably astute observer"), it should be impermissible. Again, that's a made-up example that doesn't represent my personal take on the situation. But it's not crazy—notice that the manual doesn't say that refereeing decisions aren't conducted like that. You could go all the way, and wonder: 'With all these reasonably astute observers everywhere, how will FIRST poll them all?' That is blatantly ridiculous, and should probably be dismissed as such—but the fact that the statement could be interpreted that way exposes its weakness. Quote:
Besides, it's a more complex question than what the author "most likely" meant. You have to think about cases that are less likely, but still plausible (because the referees might interpret the rule differently, within the bounds of what a generic layman might believe). There's nothing wrong with asking FIRST some of the things you alluded to in an effort to narrow the solution space a bit. Indeed conversely, the author of the rule should be thinking about all the ways the rule could be interpreted by a reasonable person, and hedging against them. Either use precise language, or construct the requirement in a way that precision is immaterial. If FIRST really wants it to come down to the referee's on-the-spot judgment, then they should just say so—no need to invoke a standard that lacks a clear definition, and is potentially applied differently under different circumstances. |
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#7
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It doesn't have to be. It just has to be universal enough to be predictable by those who need to incorporate the rule into their design process. (Which again, I would like to emphasize that 118 did very well.) Quote:
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Yes, indeed, you can come up with a gazillion possible interpretations. Your job, though, in reading the rules, is to come up with the most probable one. Quote:
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Have you ever written a game? I don't believe that you have a good grasp on just how difficult it is to do that -- and how unnecessary in many situations. |
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#8
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Re: Ruling on Robonauts Balance
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#9
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Re: Ruling on Robonauts Balance
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The funny thing is that I'm not an engineer (though I have some experience with both semiconductor manufacturing equipment and quantum cryptography): my degrees are in theoretical physics, linguistics/ASL, and education, not engineering. I have, however, at one time or another been a professional freelance game designer, so my perspective on this -- and thus my disagreement with Tristan and my defense of the GDC -- comes primarily from what I know about writing game rules as opposed to engineering. Until you sit down and write a set of rules, and then have people try to play a game (even a mock-up of that game) based on those rules, you have no idea just how hard it is to write good rules -- and that's not even taking into account whether or not the game is fun to play or fun to watch or both. And as I said before, permissive rules sets are easier to write than (good) prescriptive rules sets, and each lend themselves to a very different type of game. Writing a prescriptive rules set that you know is going to be picked apart by tens of thousands of highly motivated, intelligent people is, to put it mildly, a daunting task. In light of that task, the expectation of language so precise that it can't be gamed is completely, utterly unreasonable. |
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#10
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Re: Ruling on Robonauts Balance
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One could make that statement about all matters involving one or more humans - it means nothing. Quote:
And in FIRST, the troll-bot teams will likely modify their risk assessment methodologies next year. Like I said - I wish that it did. |
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#11
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Re: Ruling on Robonauts Balance
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I gathered from your previous post that you were describing the similarity to a competitive bid as an example of FIRST mirroring good real-world practice. I'm merely saying that competitive bidding isn't necessarily something worth emulating in a robotics competition, because it is not a good thing a priori. (And yes, you can say that about anything—that's why the discussion needs to go beyond what people usually do in the real world, and instead cover why they do it, and what the consequences are.) Quote:
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Do they have reason to feel mistreated or misled? Does it matter to FIRST that they might feel that way, as a result of FIRST's statements? (And should it matter?) |
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#12
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Re: Ruling on Robonauts Balance
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It was harsh. I wish it had not happened. But it was definitely productive. The troll-bot devotees were not harmed by FIRST. They took a HUGE risk and lost - simple. There are a number of FIRST teams (along with observers) who will now dispassionately assess risk mathematically. The mentors and students involved will not easily repeat the same process and/or error, perhaps for an entire career. |
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#13
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Re: Ruling on Robonauts Balance
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While I agree that there were problems with the way the definition of grapple was handled, please don't try to put words like those in their mouths. |
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#14
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Re: Ruling on Robonauts Balance
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I'm not arguing the legality, and somewhat agree with the ruling, but WHAT they said about it, and there response to 118 was what I was disappointed about. Last edited by Andrew Lawrence : 03-03-2012 at 01:01. |
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