Suppose I did some independent investigation about some facet of Stack Overflow. I've found out some great, detailed information about a bug, and figured a post should be made.
Another user has already brought up a sub-set of that bug several months earlier. His question only covers a small portion of what is happening. My information answers the general "why" of what is happening, steps to reproduce, and also shows that the "what" is actually much greater than how he initially brought up the subject.
I want to bring the full information about the bug to light, but am unsure how to proceed. Should I post my information as an answer to the original report, even though it is not really an answer in the slightest? Should I conquer that question and restructure it to cover the whole scope of the bug instead (I personally hope this isn't the solution)? Or, if the scope of my report on the bug is past what originally has documented by a significant enough amount, is this enough to post it as a separate question (most likely linking to the original report)?