Proposition Puzzle Cryptography

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Find the solution of a propositional puzzle (with knights and knaves) to get the key. Plain text is reconstructed using a symbolic language based on the Boolean ring.

Contributed by: Izidor Hafner (August 27)
Open content licensed under CC BY-NC-SA



[1] Strømmen. "1000 Most Common Spanish Words-Frequency Vocabulary." (Jun 8, 2023)

[2] 1000 Most Common Words. "1000 Most Common Esperanto Words." (Jun 8, 2023)

[3] Wiktionary. "Frequency Lists." (Jun 9, 2023)


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