I have no background in quantum physics, and no understanding of most formulas used in this context. I'm not looking for an in depth answer, i'd just like to vaguely understand the concept.
The way i heard it, a superposition is [real/a neccessary assumption/a concept not even wrong/whatever] and will end as soon as the object in superposition is observed. I always took that "observed" part to mean "interacted with in a way that allows to make a decision on the state" and i further supposed there was no cheating a la "oh but i entangled A and B and now i just observed A, so B will be alright" and suchlike .
So now we have quantum computation, which seems to rely on the superpositions of objects somehow covering a whole lot of bases at once and then [something something] which produces an answer - my question is about the i/o process: How can i input something so a superposition is achieved that encompasses the information i input, without automatically destroying the relevant superposition? How can i be sure my input was put in without looking? how can i look without destroying the very thing i wanted?