I honestly don't understand how some of these bits don't make you step back and question them some.
The most solid allegations in that story are from:
three sources familiar with the matter
...and...
A person familiar with Mueller's strategy
Wouldn't that sort of ambiguous language make you a bit skeptical in pretty much any other context?
ETA: Consider a person with a microphone interviewing four people on the street:
Persons 1, 2, and 3...
Interviewer: Are you familiar with the investigation into Trump being led by Meuller?
Random person on the street: Yes, I'm familiar with the matter.
Interviewer: Do you think prosecutors want to know what Trump knew about the meeting between his son and the russions in June?
Random person on the street: Yes, I think prosecutors want to know that.
Person 4...
Interviewer: Are you familiar with Meuller's strategy regarding his Trump investigation?
Random person on the street: Yeah, I think so.
Interviewer: Do you think it's now of interest to prosecutors whether or not Trump made a knowingly false statement?
Random person on the street: Oh totally, I think they totally are interested in whether he made a knowingly false statement!
Interviewer: That's a wrap boys, we've got all the quotes we need, let's print this sucker!
++++++++++++++++++
Maybe, maybe not. But since all we have is essentially "someone said something", it leaves a bit to be desired in terms of solid evidence, wouldn't you think?