Are we certain of uncertainty?

http://www.redorbit.com/news/science/1112689943/heisenberg-uncertainty-principle-090812/

“For clarity’s sake, one should be aware that the uncertainty principle is not the same as the observer effect, which states that the act of observing a phenomenon will change the phenomenon itself.  The uncertainty principle is more about how precisely something can be measured in two dimensions such as position and momentum, simultaneously.  In common parlance, the two theories are often confused”