DaveC426913 said:
But you know that's not what she meant, which means you're being deliberately obtuse.
People who
are obtuse don't pretend to be obtuse. They strive to be acute.
You know she didn't mean gravity would change right now; she meant it could change at some arbitrarily distant time in the future.
I observed that she set it far in the future. I am guessing she chose 10,000 years because people naturally associate long time intervals with great change, which makes it psychologically easier to agree that whatever phenomenon you pick might be different. I am the one who asserted that, if it could happen at any point down the road, it could happen in ten minutes as well. Nothing she said excludes that alternative. She offers no suggestion of any possible mechanism for such a change, or even what the nature of the change that makes the law invalid might be, so there's no reason to suppose it's authentically time dependent.
"There is no definite means whatever of knowing if the law of Universal Gravitation will remain valid in 10,000 years."
The statement is not about change over long periods of time, it's about not being able to know something for certain. Therefore, it's perfectly valid to envision the suggested change happening much closer in time. The important "not knowing for certain" is intact.
Well, remember, we weren't there. We did not hear what she said in context. We have only the OP's contextless transcript. And since we can't judge, we are obliged to give her the benefit of the doubt. For all we know, the next thing she said was "of course, that doesn't mean go jump off a cliff. We're pretty darn sure it won't change anytime soon - but the principle is there."
The OP got the exact quotes he eventually posted from the text. She wrote the text and is teaching from it. If you're interested in the context, he can provide it. It seems obvious to me that if there are mitigating statements around the quoted part, he should have posted them long ago. Just in case, let's request he look and report back.
The budding scientist must be taught that our knowledge, while excellent, is not ironclad. To temper the numbers with a sanity check.
Not in dispute.
No. Comments like ''why doesn't she go jump off a cliff?" are discussion-closers, not discussion-openers. They designed to encourage derision and dismissal of the opposing case. They are appeals to emotion rather than rationality. That is argumentative.
Dave, I posted the definition of argumentative. Amazingly, you quoted it and had it right in front of you when posting your mis-definition of it. Derisive and dismissive are
not synonymous with argumentative.
Here it is again:
ar·gu·men·ta·tive *(ärgy-mnt-tv)
adj.
1. Given to arguing; disputatious.
2. Of or characterized by argument:
Meaning 1. is the one that you might level against a person if they seem to chronically seek out arguments. There is no automatic connection between it and someone who is derisive, dismissive, or who appeals to emotion rather than reason.
What you are mistaking for "derision" is, in actual fact, an example of "Reducio Ad Absurdam":
In its most general construal, reductio ad absurdum – reductio for short – is a process of refutation on grounds that absurd – and patently untenable consequences would ensue from accepting the item at issue.
An ancient and accepted means of making a point. RyanM_B's quote was in the same vein.
http://www.iep.utm.edu/reductio/
Because miniscule is not zero.
Where do you draw the line and stop holding your breath? Should Einstein not have written GR because there's a non-zero possibility he'll look like a fool sometime between now and 10,000 years from now for not having forseen the Big Gravity Change? Does Newton look like a fool because he did not remotely anticipate Einstein?
In the classical world, a particle in a box will stay in that box FOR.EV.ER. In the quantum world, small as it may be, budding scientists must realize that our world is fuzzy around the edges. Gravity's constancy is the same kind of 'remember you can't speak for forever.'
The lesson is completely lost when you apply it to something that has a minuscule probability of happening. When you apply it to something that seems, at first, secure, but can be demonstrated not to be, then you make your point.
It is not a knee-jerk reaction. But nice try

The hallmark of a knee-jerk reaction is evident in yours - when pressed to defend it, you went off on a tangent...
"...the hallmark of a knee-jerk reaction"? Got a link? What school of psychology is this you're getting your info from? I've read a lot about the 'indicators' of things like lying, distress, displeasure, affection, and others, but I've never run across "the hallmark of a knee-jerk reaction".
The hallmark of a knee-jerk reaction is evident in yours - when pressed to defend it, you went off on a tangent...about UFOs and perpetual motion machines - as if she was guilty of saying these things. You judge this case on the merits of some other case(s) that you obviously relate to this one, yet they have no bearing here.
OK. I guess I have to spoon feed you once again. What she has in common with the UFO nuts, I was contending, was a shared tactic of trying to undermine Science in order to allow for their personal interest. I did not imply her statement was as nutty as what a UFO nut would say, Dave. I asserted she was using the same tactic. The UFO nuts, etc, I said, try to undermine things like conservation of energy, in order that their particular interest not be ruled out. Her motive was, I contended, to undermine Science to save face as a philosopher. Inferiority complex and all that. It's very weird to me that you have such a hard time sorting that out. I thought it was pretty clear I had ascribed the same tactic but a different specific interest to her. I fully understand she's not allied with UFO nuts, etc in their beliefs. My post did not compare her to them on the level of having said those things, herself. It compared her to them on the level of wanting to undermine science to protect personal beliefs.
It was apparent that you had your arguments cocked and loaded for rapid fire long before this thread was started and you fired them whether or not they actually applied here. That is a knee-jerk reaction.
It couldn't have been apparent because I didn't. I was completely on-the-level about how methodical and meticulous I was in looking at the statement. That does not insure I'm correct, it should merely assure you my reaction wasn't "knee-jerk".
I started composing this response about quarter to nine, P.M. and it's now 2 A.M.. I've been working on it continuously the whole time. I'm not a knee-jerk type poster. I think about what I'm saying.