Not troll, but just an obvious question to you maybe.

When you take out the lens, what you see (with the focus points markings) is the mirror, right? And then that flips out of the way when you press the shutter and then the sensor itself is revealed, right?

So my question is, if dust somehow manages to get in through the lens let's say, wouldn't it just settle on the mirror? Then why is it possible to see dust specks when you shoot small aperture photos? Shouldn't the mirror move up and that's where most of the dust is anyway? Like it shouldn't really get on the actual sensor.