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5 7 8 9 10 11 12 13 14 15 16 17 18 19 You’ve heard of the 2-value boolean The 3-value boolean wich has null Even perhaps the 4-value boolean Now, for a limited time only The FIVE value boolean! it’s the "Foolean" type Foolean Yup Nope Dunno Huh Yeet true false null I0 failure function that returns a Foolean