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From my experience, not explicitly. But a technical writer does need to understand what they are writing about in order to communicate it effectively. If you'd like a book on the subject, Technica...
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Source: https://writers.stackexchange.com/a/2054 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
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From my experience, not explicitly. But a technical writer does need to understand what they are writing about in order to communicate it effectively. If you'd like a book on the subject, [Technical Communication](http://rads.stackoverflow.com/amzn/click/0312692161) by Mike Markel is an excellent resource for all aspects of technical writing and communication.