well, the first time I saw an ameboid star, and then very shortly I saw an invasive (where I live) oak’s sapling. I’d say it’s not an OI, it just makes you search for the focus of the image. The classic example Lumifer links to is something where you might not even think of looking for the other image; and of course, there should be ambiguity things nearer to crystal clear end of spectrum.
well, the first time I saw an ameboid star, and then very shortly I saw an invasive (where I live) oak’s sapling. I’d say it’s not an OI, it just makes you search for the focus of the image. The classic example Lumifer links to is something where you might not even think of looking for the other image; and of course, there should be ambiguity things nearer to crystal clear end of spectrum.