There is a detail in the 2-slit experiment interpretation that bothers me, when analyzing it for instance in the Cohen-Tannoudji book (pg.13) they say the purely wave interpretation was rejected because "we can expose the photographic plate during a time so short that it can only receive a few photons. We then observe that each photon produces a localized impact on the screen and not a very weak interference pattern." But aren't localized impacts precisely a very weak interference pattern when this pattern is formed by very many localized impacts? I mean what determined patterned was expected if you only have a handful of impacts? If you have a pattern made of thousands of points and you erase all the points but 3 or 4 in whatever location surely you can't recover the previous interference pattern, there are simply not enough points. So what bothers me is that with this kind of set up it can't be decided whether to reject the purely wave interpretation because there is no possible way it could have been not rejected unless you previously decide a minimum number of impacts necessary to produce a given pattern.