Note for the confused: the "observer effect", as in modifying a system by poking it in order to measure it, is not the same thing as the uncertainty principal.

Note for the confused: the "observer effect", as in modifying a system by poking it in order to measure it, is not the same thing as the uncertainty principal. Evidently, somehow, Heisenberg himself got the two confused (?!) which is why when I learned about it by fucking reading Heisenberg ("surely this will be accurate") I ended up thinking the two were basically the same thing.