well four missiles, three controlled demolitions and norad and the media being hacked.
And the firefighters, etc, who would have to be in on it for some reason. And the invisible people planting invisible explosives in the buildings in the preceeding days (a controlled demolition is a complicated job, not just a matter of lobbing explosives in the basement) and the missiles disguised as planes for some reason. And the silent explosions.
sounds a hell of a lot likely and probable than a bunch of tea towel headed people taking over four planes with box cutters, doing near impossible flying meanevours to hit 3 out of four targets and then the buildings which were built to withstand multiple plane impacts, crumble into dust at FREE FALL SPEED (the speed of mavity), then at 5pm in the afternoon a building that was not hit by anything becomes the third building in history to collapse at free fall speed.
As I outline above, your conspiracy "theory" sounds utterly ridiculous. It does not sound at all probable. In fact, it sounds impossible.
I'll address the points you find improbable one at a time:
i) The hijacks. Prior to this, hijackings were done for specific purposes (e.g. release of prisoners) and did not involve killing all the passengers. Usually, the hijacking was resolved without any passengers dying. So a hijacking could be carried out with knives because the threat of immediate death is greater than the outside possibility of death later.
ii) The quality of the flying. It is not hard to fly a modern passenger plane at a very large target, espeicially in the air. It is also not hard to learn the controls beforehand - they are not secret and there were even simulators available at very low cost.
iii) The buildings weren't built to withstand a direct high-speed impact with a massive plane without massive damage. That would be impossible. They stood up to the impact as well as could be expected.
iv) They didn't crumble into dust at freefall speeds. Are you arguing that all the video is faked and all witnesses are lying? Of course, you'd expect a weakened structure on fire to collapse rapidly when hit directly from above by many, many thousands of tonnes of weight.
v) Are you referring to the tower that was hit by parts of the other towers when they fell? The "one that was not hit by anything" yet had a multi-storey hole in it where it was hit by falling debris from the other towers?
oh yea which one is silly again ?
The one that requires thousands of people to be in on a conspiracy for the USA to attack itself using non-existent technology and relies on provably untrue statements. In other words, your one.