There are a lot of lines not connected with each other, plus a lot of other texture details that give this away as Ai's. Tagging it as such.

Calmaify said:

There are a lot of lines not connected with each other, plus a lot of other texture details that give this away as Ai's. Tagging it as such.

could you teach me those things?

Adverso said:

could you teach me those things?

Starting from the easy part. Looking at this picture in particular, try to follow the shoulder line on our right. You can clearly see how it breaks in various part. On our left not only it breaks, but it also changes suddenly and violently in how wide it is.
Now take a look at the hair. While the light on the head might be difficult to pin point as "absolutely odd and nonsensical" for someone who hasn't study light as an artist, you can instead take a look at the shape of them above her breasts. Another good place to look is the arm on our right or the bundle of hair on her left, going inside the wedding dress for some god's forsaken reason.
The hardest part to notice and, what is going to take a bit to get used to, are however the textures. Just look at the breast on our right, some are simply all over the place, suddenly drawing very linear shapes. You can also notice that the textures on the tiara suddenly breaks.

Hope this was informative. <3