Jnana,
If you did read my post through and through you would notice that I corrected my statement in an edit shortly after making it. I just did not remove the original statement because it would give a false idea of actual knowledge, instead of post-learned information due to later research.
However, you are right that these kinds of things aren't taught in science classes anymore. You get the general lowdown on how condensation works, but you would have no foundation to know that kerosene is a hydrocarbon. The second I found that piece of information, I corrected my statement because I do have knowledge as to how the basic chemistry around it plays out.
I will argue however that alot of what is taught in school is being weighted far too much as actual truth, and less to none as strong theories. Put up a logical question to a science teacher and your arguement will be dismissed with no good explanation as to why that hypothesis is false.
Fact is, two or more planes can be observed next to eachother in the sky, where one makes a large persistant contrail, whereas the others only make a small short one that dissipate immediatly behind them. Might be pockets of air and other factors playing in, but that would mean that one plane could manage to follow the same pocket of air across the entire sky, while the others manage not to enter one.
As long as I'm grounded on mother earth, with no possibility to check for myself why it happens as "they" say it does, I'll have to leave it with reasonable untested hypothesis. Maybe some day I'll get a more definitive answer which is not highly biased towards the science in question. "Respected" people refuse to test them, because they are "wrong".
I'm not overly concerned about chemtrails myself, in fact I'm not concerned about anything at all. As long as I'm strong in mind and soul, I know I'll be ok.
But I'm curious in nature, and want to find answers to pretty much everything that can be answered.