Hi. I'd like to talk about the double-slit experiment performed with electrons. We know that any device, used to tell us which slit the electron passed through, destroy the interference pattern that we would observe if we used no devices. Well, but what does it happen if we don't receive the signal from the device? In other words, if we are out of the laboratory (or we are blind and deaf) while the experiment is performed using a device? Would the interference pattern be still destroyed? The main question is what destroy the interference pattern: -the interaction device-electrons; or -the informations WE have about the process Thanks.