Reddit does not have a monolithic policy concerning duplicate knowledge entities. In some cases, duplication is allowed; in other cases, it is not. It largely depends upon the community and moderator.

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- Stack Overflow
- Quora
- Reddit
- Wikipedia
- etc

How Different Online Communities Handle Duplicate Knowledge Entities

Stack Overflow is a Q&A site where knowledge entities are presented in the form of questions and answers. Stack Overflow does not allow duplication of knowledge entities. This is enforced through a variety of methods. 

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