On 14/01/2021 10:26, Ahem A Rivet's Shot wrote:
> On Thu, 14 Jan 2021 05:48:16 +0000
> The Natural Philosopher  wrote:
>
>> (iii) Its down to high flying aircraft contrails, so we should just stop
>> flying.
>>
>> Of these the only currently  *testable* one is (iii) and when air
>> transport did shut down post 911 there were in fact colder nights in the
>> USA. And post Covid 19 shutdown there has been a rather cold northern
>> hemisphere winter.
>
>  I've seen comments that during the 911 flight shutdown the average
> temperature over the US rose a little. I have no reason to doubt either
> that observation or yours, it is just an indication of how difficult it is
> to test even that hypothesis - let alone ones like "It's a mix of i and ii
> proportions unknown". Personally I don't believe anything that ascribes a
> single cause to a complex phenomenon because I ain't seen one yet.
>
And it throws into question the whole notion of a 'cause' anyway. When
you have negative feedback, time delayed, over enough delay paths you
will get pseudoperiodic variations with no *external* 'cause' at all.

in short your dynamic system will wobble around some sort of attractor,
or set of attractors, in a completely chaotic manner. All by itself.

But anyone not familiar with the depths of chaos mathematics will look
at it and say 'what is *causing* that'?

And go looking for a nonexistent driver external to the system.
Whilst other seek to find 'cycles' of constant frequency in what is a
pseudorandom oscillation.



--
“It is hard to imagine a more stupid decision or more dangerous way of
making decisions than by putting those decisions in the hands of people
who pay no price for being wrong.”

Thomas Sowell

--- SoupGate-Win32 v1.05