User blog comment:ReverseZoom101/"Crisis On Earth-X" Plotholes and Easter Eggs!/@comment-3127448-20171210072250

I asked about the kryptonite arrow to another blog post too AND the episode discussion. All I got was sarcastic replies.

I think the writers are being sooooo inconsistent that Flashpoint is their excuse for everything.

Another plothole: How did people know about Krypton/Kryptonite/red sun being Kara's weakness? When did it ever mention on earth one about these things? Kara mentioned in last year's crossover, "they came to my planet before I was born" without saying which planet. So how does earth one know about it? Kara said to Barry in World's Finest "And I'm from another planet". Again, she didn't say which one.