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Why are blue-inked pens so widely accepted as appropriate and professional in comparison to other colored pens?

1698 upvotes

1019 upvotes

Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why are blue-inked pens so widely accepted as appropriate and professional in comparison to other colored pens?	1698
What's with the preoccupation of 20th century sci-fi writers with "psychic powers"?	1019