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  "body": "\n## Summary\n\nIn logic, a **logical constant** or **constant symbol** of a language $\\mathcal{L}$ is a symbol that has the same semantic value under every interpretation of $\\mathcal{L}$. Two important types of logical constants are logical connectives and [[quantifiers|0FYQMKFE77]]. The equality predicate (usually written '=') is also treated as a logical constant in many systems of logic.\n",
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