“Why other images of the same place taken by several different craft (including non-NASA ones), including images at almost 100x the original resolution of the Apollo photo, don’t show the feature.”
Now clearly here, he’s implying that there are images from “non-NASA” missions which don’t showthe Ziggurat on them, and further, that he has seen them. How else could he claim they “don’t show the feature” if he hasn't seen them? If true and these images exist, then he should produce them. The burden of proof is not on me to produce them, it’s on him. He’s the one claiming they exist, not me.
Of course, so far, all he has produced are NASA images of the area, which, given that they've already painted over parts of the Ziggurat, I don't exactly trust.
If there are such "non-NASA" images, then produce them, otherwise shut-up about them and admit you BS'd your readers into thinnking they ever existed in the first place.