Questions about software or libraries should be appropriately tagged.
Questions about the math/physics involved in a calculation should be answered as points of clarification.
For example: "What approximations are being made when I do a CASSCF calculation in Gaussian 03?", is a question that clarifies the technique but does not address the approximation(s).
Questions about the validity of an approximation should be a community based judgment call.
3a. They should be voted on by the community through comments and comment up-votes:
Is it essential that these questions are answered here?
Are there two questions here, one about Computational Science and one about math/physics, and should the be split?
3b. If it is voted that it is more math/physics based, the question should be migrated to the corresponding SE site by a moderator.
3b. If it is voted that it is more math/physics based, the community should suggest, through comments, how the questions might be improved to fit with in the purview of this site.
- Questions about compilation errors, runtime errors, compilation flags... should be migrated to a mailing list or reworded and migrated to stackoverflow.