Is self-answering questions welcome on PhysicsOverflow?

Question

is self-answering questions on PhysicsOverflow generally encouraged?

Probably nobody would object to the scenario, where somebody asks a question of which he does not know the answer when posting it, subsequently finds the solution/explanation himself, and then posts this as an answer too.

Another potential use of self-answering, suggested by Arnold Neumaier, would be to give a clearer  expositions of material that is presented in the literature only in a more obscure way, which would be rather an answer and the question would have to be "constructed".

What do people here think about this?

Answer 1

I see no issue with self-answering questions. Self-answering = contributing content; there is nothing wrong with that, and it should be encouraged.