So I've got a question for the panel...

The double slit experiment has been a popular point of conversation for some time. It has been pointed out many times, and again just today, that one advantage of the delayed choice experiment is the fact that you don't have to touch the particle to figure out it's path. True enough, but there are some downsides to the experiment as well.

The question I have is this:
If you instrument ONE slit in a DS test and also track impacts at the target, you now have data on both slits.

Many claim that the particle behavior of the photons that travel through the instrumented slit was possibly caused by the fact that it was "touched" by the sensor's illumination. Fair enough.

But how does one account for the fact that the uninstrumented slit's photons, which were never illuminated also struck the target behind the appropriate slit? And thereby also exhibit particle bahavior without any possibility of disturbance. ?

Isn't this pretty convincing evidence of loss of superposition by collecting the data, without needing to argue about effecting the photon's flight path?

You have two slits.
You cover one - there is only the other - and you know (at least you should) that you did send a "photon" out.
You registered it at the other side. Since it did not go through the one slit you watched, there was only one other way.

You'll never see interference with this setup.

Superposition is another way of saying (in laymans terms) I don't know what or where a "Thing" is, yet.

... not appreciating that the "Thing" is an assumption ... IMO