Thanks for the answer! Yes you understand me correctly. They say that, if you stop recording the data but leave the detectors working, the interference is back, but this is unclear for me. You can say that you stop recording like switching of the recording computer, or stop recording like removing, or changing something in the system physically. So both things are different and looking the schematics of the quantum eraser experiment actually they mess around with the setup physically. So my question is how measuring with changing the experiment setup is equivalent to just observing and measuring. So how you can measure without intervening – as example you can use a cloud chamber and look the trajectories and whre the particles land, without messing with the setup – you just look literally with your eyes and record with a camera without any intervention. Maybe I miss something so I am asking. Thank you for your kindness!