Grammatical error when a book has been completely learned

Game Talk The Garage
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A screenshot of the error -

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That’s not a grammatical error.

“this Under the Hood” is referring to the Under the Hood magazine, i.e. this one specifically.

Also, nobody’s going to change the entire code to fix that. “You can no longer learn from this” is a set phrase, that just ends with whatever thing you can’t learn from.

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If it’s only books that you can learn skills from without practicing, it could just say “You can no longer learn anything from this book”