I understand that personal opinions are generally going to be poor form for this site. But to what extent are personal observations the mark of a poor answer?
For example, someone asked if there were any denominations that do X. I had direct evidence from my having watched online video of the plenary session of a "churchwide assembly" of one denomination. I distinctly remember one speech given at the session, which was directly related to the question. But I could not find the speech on Google. Is my own recollection of the speech acceptable citation?