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by grahamlee
526 days ago
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> The part that’s weird with nulls is that it’s a trinary logic stuffed into a boolean algebra. It's a three-valued logic (though not trinary, which would use a base-3 number system) in a three-valued algebra: specifically, the relational algebra. The outcome of a logical test has three values: true, false, or NULL; this is distinct from Boole's algebra where outcomes have a continuous value between 0 and 1 inclusive. |
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