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From: Jeff Liebermann <jeffl@cruzio.com>
Newsgroups: rec.bicycles.tech
Subject: Re: fast tires
Date: Thu, 19 Jun 2025 14:31:35 -0700
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On Thu, 19 Jun 2025 16:53:00 -0400, Catrike Ryder
<Soloman@old.bikers.org> wrote:

>On Thu, 19 Jun 2025 16:27:01 -0400, Radey Shouman
><shouman@comcast.net> wrote:
>
>>Catrike Ryder <Soloman@old.bikers.org> writes:
>>
>>> On Thu, 19 Jun 2025 12:48:26 -0700, Jeff Liebermann <jeffl@cruzio.com>
>>> wrote:
>>>
>>>>On Thu, 19 Jun 2025 14:46:09 -0400, Catrike Ryder
>>>><Soloman@old.bikers.org> wrote:
>>>>
>>>>>On Thu, 19 Jun 2025 14:20:34 -0400, Radey Shouman
>>>>><shouman@comcast.net> wrote:
>>>>>
>>>>>>Catrike Ryder <Soloman@old.bikers.org> writes:
>>>>>>
>>>>>>> On Wed, 18 Jun 2025 12:58:56 -0400, Frank Krygowski
>>>>>>> <frkrygow@sbcglobal.net> wrote:
>>>>(...)
>>>>>>>>IOW if you turn an object loose with only its weight acting on its mass, 
>>>>>>>>it accelerates downward at one "gee."
>>>>>>>
>>>>>>> Count me unimpressed by Krygowski's cut and paste.
>>>>>>
>>>>>>I'm reasonably sure that was written extemporaneously.  Any engineering
>>>>>>professor should be able to do the same.  Any practicing engineer will
>>>>>>have gone through the same reasoning many times.
>>>>>
>>>>>I'm reasonably sure he copied out of a book.
>>>>
>>>>To impress you, must one now memorize all the proofs and calculations?
>>>>That seems a bit excessive.  Do you memorize everything?  I don't,
>>>>mostly because my memory is not as good as when I was young.
>>>>Secondarily, because I don't like distributing potentially wrong
>>>>proofs and calculations.  If you have memorized everything, I too
>>>>would be very impressed.
>>>
>>> I don't learn things by rote, I learn by knowing how things work.
>>
>>If only you knew how force, mass, and acceleration worked you could
>>also write out an explanation similar to that of Prof. Krygowski.
>
>
>And I'd probably get it wrong. I'd say, "Who cares?"

I care.  I don't like half baked explanations.  The problem is all
such explanations are half baked because they don't take into
consideration forces, masses and accelerations that only are important
in unique situations.  Newtonian mechanics worked quite well, until
scientists discovered relativistic and quantum effects.  It's really
hard to claim something is right or wrong when all the calculations
result in probabilities instead of fixed numbers.

>Krygowski would
>have to very sure he got all the commas and brackets exactly right.

Why?  Nobody else does that.  Most people do their best and hope they
got it right.  Very few people provide rigorous proofs and copious
citations that agree with their conclusions.  I do my best to provide
URL's from sources that either agree with my assertions or offer more
detail on a topic that might help someone understand the topic.  If
people only posted things that they knew and could prove were
absolutely correct, we would have nothing posted in rec.bicycles.tech.
I've certainly produced my share of wrong information, incorrect
analysis, bad conclusions and arithmetic errors.  I do not consider
these to be problems if I correct my mistakes (and apologize to the
group).  They are problems if the author goes into defensive mode and
performs damage control using contrived facts and data.

At this point, the usual solution is to ask an expert.  However, that
doesn't work very well:
<https://www.learnbydestroying.com/jeffl/crud/Premature-Judgement.txt>

-- 
Jeff Liebermann                 jeffl@cruzio.com
PO Box 272      http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann      AE6KS    831-336-2558