Consider this a footnote to the previous post on "plagiarism."
I discovered when I was writing my dissertation that, however much I thought I had copied a source perfectly, with quotation marks, generally something had been omitted or changed in the copying. It was a moment of horror to go back and verify the date of publication or pagination, only to discover that a mistake had been added to the precious words of the cited authority. A reader of this blog will perhaps have noticed that I often put quotation marks around certain phrases, which means that they come directly from the source I am talking about. In a blog like this I resist quoting very long passages with quotation marks; that's another reason why I also cite the publication details. To some extent I suppose I am like Fritz Strich, seamlessly (I hope) blending my thoughts with those of my interlocutor. (By the way, I also give attribution to illustrations I have taken from other sources, unless they are from Wikipedia or from a self-evident commercial advertising source.)
Picture sources: Beauty Best Friend; Ethnography Matters; Lapsura