What do you have in mind in terms of the writer needing to test her assumptions? I don't know what that means, both in terms of the assumptions that she's obligated to test, or what that "test" would look like in the article.
Here's an example of an assumption she could have tested (as opposed to re-printing as a quote).
The headline of this article starts with: "He (Musk) is full of shit".
Why?
Because that's a quote from a single person she interviewed, who is a disgruntled ex-employee of Tesla with a history of ranging against Tesla and Musk (to quote the article "Since then, he had taken to sending Elon Musk emails and point-blank tweets, describing the pain the layoffs were causing.").
(as a total aside, if you've heard about a laid off low-level employee angrily tweeting and e-mailing a CEO of Fortune 500 company (116 to be exact) you would probably think "an unstable person" not "a good subject expert to interview").
Instead of treating "Musk is full of shit" as a fact, she should could ask herself "is Musk really full of shit"?
Should could do it by asking more people what they think about Musk, more Tesla employees, including those that are still happily employed.
This article is clearly sourced from the most vocal, the most virulent Tesla haters (the self-proclaimed members of $TSLAQ on Twitter).
You can easily find even more people very happy with Tesla's products and I'm sure there are plenty of employees who think highly of Musk.
But it's clearly a hit piece, not interested in presenting a balanced account.
The part about Walmart lawsuit doesn't mention Tesla's response (which paints Walmart in a very bad light) or subsequent joint statement from Walmart and Tesla where they make nice.
