my point is the advice is just factually false in most cases. Maybe it's just hyperbole, but the article's advice is wholly inappropriate for someone actually trying to improve

If it's a career, you literally cannot do 80 hours per day.

If it's not your career, if you aren't trying for at least an hour, an imbecile would understand they're not trying.

No one tries to learn a language and is confused that they're not learning it fast enough; they know they can put in more effort.

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The person having incredulity is not the same person who isn't trying on their goal.