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Hi, I’m Jamie Condliffe. Greetings from London. Here’s a look at the week’s tech news:

In the quest to clean up the web, the gray area between good and bad will be hard to handle.

As the Notre-Dame cathedral in Paris burned last Monday, a YouTube effort to fight misinformation failed. The platform’s automated fact-checking feature — a box that shows facts to help viewers contextualize footage — incorrectly displayed information about the Sept. 11, 2001, attacks alongside live streams of the fire.

“These panels are triggered algorithmically, and our systems sometimes make the wrong call,” YouTube said in a statement. The company said it had no further details about what went wrong.

The failure raises a question: If a platform can’t provide facts reliably, how can we trust it to take down bad content correctly?