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Accepted Answer

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Question 2

Why do I need an account?

Accepted Answer

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Question 3

Can I share the PDF?

Accepted Answer

Yes, within the license. The content is CC BY 4.0: share or adapt it as long as you credit aievals.co and the author. The stamp identifies your download, it does not narrow the license; when you can, share a link to the live page instead, which stays current.