There have been two enormous mistakes in The New York Times this week — errors that completely undermined the premise of the stories.

1. On Monday, Lisa Friedman wrote that government scientists had surreptitiously given her a draft report on climate change because they were concerned that the Trump administration would suppress it. But as Erik Wemple of The Washington Post explained, the report had been publicly available for months, and was even parked at the Internet Archive.

2. On Wednesday, Adam Nagourney reported on an internecine battle among California Democrats that is supposed to tell us something about the struggle between the party’s progressive and establishment wings. It struck me as pretty thin gruel given that we learn both combatants in the bid for party chair, Eric Bauman and Kimberly Ellis, supported Hillary Clinton last year, although Bernie Sanders is supporting Ellis now.

But then we get to the bottom and see this: “An earlier version of this article misstated the candidate Kimberly Ellis supported in the Democratic primary race last year. It was Hillary Clinton, not Senator Bernie Sanders.”

Imagine reading this before the correction was made. It’s a completely different story. It’s not about the continued hostility between Clinton and Sanders supporters at all. As with the climate-change story, it’s the sort of article that might very well not have been published at all if the facts had been clear beforehand.

I know that quite a few copy editors lost their jobs at the Times recently. Could that have something to do with it? Maybe. But the Times still has a larger editing corps than any other paper. Moreover, these kinds of large, conceptual errors strike me as something that have been endemic at the Times for many years. I suspect it has more to do with the culture than the copy editing.

Sounds like a good topic for the public editor. Oh, wait. Never mind.

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