To anyone who understands information theory and security and is in an infuriating argument with someone who does not (possibly involving mixed case), I sincerely apologize.

"Password Strength", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License

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To anyone who understands information theory and security and is in an infuriating argument with someone who does not (possibly involving mixed case), I sincerely apologize.