I think you're conflating average and mean. When it comes to income average is typically median, which does include billionaires but wouldn't skew the data due to their inclusion.
It's a bit of both. Infants have more neural plasticity as others have mentioned, so when using the same learning strategy babies are going to learn better. That said, adults have a lot more knowledge and experience and are able to make connections to a lot more things; so there are methods aimed at teaching adults that are more effective than methods used to teach babies.
I can't say for sure whether or not this particular study used proper testing, but as a whole introversion and extroversion is not pseudoscientific.
Jung wasn't a good scientist, but he did a lot of studies and came up with a lot of theories, some of which happened to be at least partially correct. Also, you seem to be getting something mixed up because Jung defined introversion as an "attitude-type characterised by orientation in life through subjective psychic contents", and extraversion as "an attitude-type characterised by concentration of interest on the external object", whereas the more common energy focused definition is not from Jung at all - at least, as far as I am aware.
The big five personality traits, namely openness, conscientiousness, extraversion, agreeableness, and neuroticism have been shown to be consistent, even cross culturally.
There are limitations to that: like how it's an empirical observation, that other personality traits exist that aren't factored into those five, or that it's possible there are a larger number of smaller subfactors that make up those five traits, but ultimately they are scientific.
I've found it easiest as a two step process, first removing all the vines using loppers (the kinda bolt cutter looking things), and then once that's all been trimmed close to the ground and all the vines discarded, then using a normal shovel to uproot them.
Except by that exact source, mass shootings with rifles are under reported and the deadliest mass shootings were done with semi automatic rifles.
"Since 1982, there has been a known total 65 mass shootings involving rifles, mostly semi-automatics. This figure is underreported though, as it excludes the multiple semi-automatic (and fully automatic) rifles used in the 2017 Las Vegas Strip massacre – the worst mass shooting in U.S. history, killing 58 and wounding 546. In fact, semi-automatic rifles were featured in four of the five deadliest mass shootings, being used in the Orlando nightclub massacre, Sandy Hook Elementary massacre and Texas First Baptist Church massacre."
Even in this situation it's uneven. If the company pays you the right amount within a couple weeks, nothing happens. It's as if they never shorted you.
If you take the money from the company, you - at least - pay an additional fine. And/or go to prison. The company doesn't have either consequence for attempting to steal from you.
I don't think the potential difference between how much damage can be caused is a reasonable argument. After all, economic damages to writers from others copying, plagiarizing their work or style or world is limited not because it's hard for humans to do so, but because we made it illegal to make something so similar to another person's copyrighted work.
For example, Harry Potter has absolutely been copied to the extent legally allowed, but no one cares about any of those books because they're not so similar that they affect the sales of Harry Potter at all. And that's also true for AI. It doesn't matter how closely it can replicate someone's style or story if that replication can never be used or sold due to copyright infringement, which is already the case right now. Sure you can use it to generate thousands of books that are just different enough to not get struck down, but that wouldn't affect the original book at all.
Now, to be fair, with art you can be more similar to others art, because of how art works. But also, to be fair, the art market was never about how good an artist was, it was about how expensive the rich people who bought your art wanted it to be for tax purposes. And I doubt AI art is valuable for that.
But the thing is, it's not similar to turning their work into a play or a TV show. You aren't replicating their story at all, they put words in a logical order and you are using that to teach the AI what the next word logically could be.
As for humans taking much more time to properly mimic style, of course that's true (assuming untrained). But an AI requires far more memory and data to do that. A human can replicate a style with just examples of that style given time. An AI needs to scrape basically the entire internet (and label it, which takes quite some time) to be able to do so. They may need different things but it's ridiculous to say that they're completely incomparable. Besides, you make it sound like AI is it's own entity that wasn't created, trained, and used by humans in the first place.
I don't see why they (authors/copyright holders) have any right to prevent use of their product beyond purchasing. If I legally own a copy of Game of Thrones, I should be able to do whatever the crap I want with it.
And basically, I can. I can quote parts of it, I can give it to a friend to read, I can rip out a page and tape it to the wall, I can teach my kid how to read with it.
Why should I not be allowed to train my AI with it? Why do you think it's unethical?