What is the consensus or policy on crossposting answers on a single Stack Exchange site or across different Stack Exchange sites? (I searched and found a lot of questions and answers about crossposting questions but none for answers.) I often encounter a situation where:
- There are duplicate questions on one or more Stack Exchange sites
- Some these questions are linked together through the "duplicate questions" notices
- Some of these questions are locked
- Possibly some of the questions have good, comprehensive answers
In some of the cases where the above happens, there are sometimes isolated questions without good answers even when good answers exist on some of the questions. In other cases, no good answer exists, but the questions are still scattered. For me, this creates a situation where I'm not sure where to post an answer even if I am confident I can answer a question well.
My question is about what to do in such situations. Is it okay to crosspost the same answer on all the duplicate questions? Is it okay to make one the canonical answer and link to it from the other questions?