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##### 14.8.2.16 `:eval`

The `:eval` header argument can be used to limit the evaluation of specific code blocks. `:eval` accepts two arguments “never” and “query”. `:eval never` will ensure that a code block is never evaluated, this can be useful for protecting against the evaluation of dangerous code blocks. `:eval query` will require a query for every execution of a code block regardless of the value of the `org-confirm-babel-evaluate` variable.