If you use FB on a computer instead of a phone, the FB Purity browser extension will let you block whatever you like. I haven't seen an ad or suggested post in years. I came here because today FB started putting posts from the groups I belong to in my feed, even though I had notifications off for all of them. So I was able to filter them back out by blocking posts containing the full name of each group (you can block by any string), so my feed is back to only posts from my friends.
I agree it is. And C.T.R. Wilson was talking about it in 1925. But the TGFs mentioned in the article are incredibly bright, and what we're trying to understand (I work in this field) is why one lightning flash makes only a modest amount of x- and gamma-rays, kind of what you might naively expect, and another makes a mind-boggling million times as many, which is not as simply understood.
The case in the paper I linked above was an intracloud flash, but nearly all cloud-to-ground flashes also start with a breakdown up in the cloud, so I agree that any model of lightning initiation can apply to both intracloud and cloud-to-ground flashes.
Navajo mythology says that a man who was struck by lightning cannot be trusted. Not because he's evil or damaged, but because he has been touched by profound alienness. He's too weird to predict.
People in the field have gone back and forth on this, but you might like this paper, which is the best piece of evidence I've seen for it in a specific case of a specific flash. Look in particular at Figure 6 to see the lightning breakdown starting just at the ionization front (curved surface) of the cosmic ray shower:
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/201...
