Too trivial is a question that can be resolved within two minutes of research effort.
Example 1: In WP Codex Action reference, why are some hooks blue and others red?
Sure, developers using the Codex should know that. But clicking a red link and clicking a blue link explains the difference already. And Google leads to the matching MediaWiki help page fast.
Example 2: Simple Jquery Script Not Working in Wordpress
A syntax error. While it is not always easy to solve these, especially due to PHP’s rather poor error messages, it is possible and off topic too.
Also, question about using WordPress for regular blogging (writing a post, opening help) are too trivial. We are a site for developers and administrators, and we should focus on that.
Beginner level are questions with a very simple solution, but still relevant to understand WordPress’ internal logic, for example the load order of PHP files.
Example: Fatal error: Call to undefined function wp_create_nonce()
Looking at the source file for the function’s declaration should explain the issue, but it is useful to explain it together with a solution on our site.
What about the edge cases?
Example: Enable page templates. How?
We should search for duplicates and be slightly less liberal than usual, but leave these questions on our site and open if there are no dupes.