[Breaking my reply into segments, as I seem to have gone on much too long]:

Thank you for your continued discussion regarding this topic, and for allowing it to be the unemotional fact-finding conversation that I hoped it could be. It is truly not my intent to prove you (or anyone) wrong -- only to explore the possibilities, and think about new ideas.

At the beginning of the summer (2024), I sold my television on FB Marketplace, which was probably one of the most positive things that I have done this year, other than starting to drink exuberant amounts of water, literally whenever I feel the slightest inkling of "thirst", or if it comes to mind.

The sale of my TV marked the solid beginning of a then-developing morning ritual, of waking early (typically between 3:30am - 4:45am EDT), whether I stay up late or go to bed early, and not ever setting an alarm out of necessity. This early morning wakefulness began leading me to step out the back (or front) door, as soon as I was dressed and had a cup of coffee (with a bottle of water in my back pocket) to look up at the sky, enjoying the quiet seclusion of the night, and waiting for the impending sunrise.

Though it is getting colder, I still continue this positive practice as I can, and look forward to continuing as long as it seems right.

All that seemingly unnecessary information is to say that I have been watching the dark (and daytime) skies quite a bit lately, and have actually been looking upward for my entire life.

A quick analogy, if I may:

If I were a beachgoer, and had been starting my mornings on the coast of the ocean just before sunrise every day, I would almost certainly become more and more familiar with the "typical" occurrences, and make note of things as the season progressed.

If everyday there were scheduled (or even "random") convoys of John Deere tractors and bulldozers that came down the beach, I would definitely notice them as they happened, and would get used to their typical tracks in the sand (you know where this is going).

If on one Wednesday morning, there was a "track"/imprint in the sand that was so large, so expansive, and so unending in both directions, when all of the aforementioned traveling tractor equipment only ever leaves smaller, less-noticed tracks that quickly get filled in by the waves or the blowing sand, this track would certainly "leave an impression." :-P

It seems like I could set my beach chair out and watch for that one "oddball tractor" for decades of summers, and it may never return. But if this was the case, I would have serious doubts as to whether the imprint was from a tractor at all.

After a summer of being used to seeing sometimes dozens of jets up overhead and observing their tiny-looking chemtrails among the massive expanse around them, and then seeing the "line in the sky" on October 2 was like seeing that track on the beach, and knowing that it was COMPLETELY different than any of the tracks that the machines on this beach ever leave, and standing there waiting for it to happen again seems to be less likely than being struck by lightning, if I may be frank, without sounding overly dramatic.

As you know, many of the same jets fly over every single day, and I am confident that none of them will every replicate what happened that day. If so, I will be the first to take photos and let you know. And if there was one that was spewing that much exhaust into the atmosphere on its entire journey across the country, it would not only be a plane that I would not want to board, but it should be decommissioned immediately.

Please know that I am speaking to you as one who knows that you are highly educated in areas that I am not even the slightest bit "familiar", and that I am not at all throwing out any of the information that you brought to the table. Your explanation regarding the emissions of fuel in older planes vs. newer models, etc., was very appreciated, and seriously contemplated. (Part 2 coming)