Ok, I think I'm with you. So if you shift the problem from the electron to the measurement device, I see how you could still see wave behaviour by destroying the information/never forcing the device to choose a state. But what if you look at the screen first, note if it's an interference...
In your example, the photons are "interacting" as waves, but aren't the electrons still behaving like particles? I'm wondering if they can interact with each other in such a way that they're both exhibiting wave-like properties/behaviours within that interaction. Maybe I'm not phrasing this...
When electrons are passed through a double slit and can either display a wave-like interference pattern or a particle-like build-up pattern, is that because their momentum/direction is changed by the measuring device interacting with them, or due to some other feature associated with being...
I understand that:
1. Electrons can interact with each other in both particle-like and wave-like ways (eg. can exhibit wavelike interference in double slit experiment)
2. Photons can interact with each other in both particle-like and wave-like ways
3. Electrons and photons can interact...