Do we close these questions as duplicates?
You should close duplicate questions if they are duplicates. You didn't need to be told that...
How do I determine if they are duplicates?
There are no hard and fast rules. You have to decide for yourself if two questions are asking for the same thing.
I am on the fence about this one, which is why I came to meta to ask for other opinions.
Okay, here's mine.
My goal is to make the Internet a better place. I do that by filtering users to the best question. I do that by closing lesser questions as duplicates of greater ones.
I tend to favor
- Broader scope
- Elegant writing
- All else equal, I close the newer one
This new summoning sickness question is general and clear. I would vote to close the older ones as a duplicate of this newer one. However, I encourage someone to write a shorter answer. The current self-answer is too long.
Somewhat related rant: I want to encourage the community to stop labeling questions "canonical". If the voters can't tell that your question is canonical, then you didn't ask a very good canonical question.