I vote for Occam's Razor and the scientific method.
That method could quite easily get you being called a conspiracy theorist.
The reality is that most folks have very little understanding of the physical laws that the Universe 'sometimes' operates under (sometimes as in to keep the quantum physicists happy

)
Then there is what the Government wants you to conveniently believe.
http://www.youtube.com/watch?v=P6MOnehCOUwThen there is 'faith' which is sold quite heavily throughout the world.
http://www.youtube.com/watch?v=Xfqht0LEOWQ