Do I understand correctly that publishing the same paper in multiple journals is considered self-plagiarism? Who in the name of the great monopoly invented such name for that?
The same morons who think that re-using something you have written before in academic work without quoting yourself is (self-)plagiarism for which you should be sanctioned?
(Yes, they are morons because no reasonable person would think this is fair. You need convoluted nonsense arguments to justify this)
It's bad manners and a waste of people's time and attention to present previously published work as novel.
Repeating a phrase or two in a document's introduction isn't going to raise flags from any serious people, but copying data, analysis, or large swaths of text? That's a paddlin'.
I think it depends. The popular exposure to this idea, where you can be accused of self-plagiarism for a paper you write for a class, does seem stupid, because obviously your prof hasn't read your paper you wrote in another class and you're not 'wasting' anyone's time.
I can also appreciate that in a "publishing papers as research" context you're completely right.
That makes no sense, either people don't know about the previous work and thus it has clear value. Or they do and they can easily skip it. Beside for a lot of work it be great if you could just literally copy and paste fragments if your previous work to deepen out some reasoning.
I think you are contradicting yourself. If a previous work has been copy and pasted, and a novel reader doesn't know, wouldn't the reader benefit from the option to actually read the previous work as a whole?
All credible authors I read mentioned quotes from earlier works. In fact, that is on the one hand an ego boost as a prolific writer, and also helps sell more copies in case of being purchasable.
Most credible university profs in Germany from the 1990th for example always referenced their former work and mention changes of the context, or in case of a theory, modifications.
Books for example, are reprinted and it has been mentioned whether changes to the content has been done.
Personally I really see no problem, leaving the decision, whether you copied something or not, to the reader.
Many forums have/had policies about not doing cross posting (in different categories). I find this similar.
Yes, maybe from the "plagiarism" angle is not very relevant, but I would prefer not to have a system in which people try to "flood" repositories (journals, etc) with the same thing over and over. People looking for new information, people reviewing will get most of the burden to "keep things clean" while for the poster that is not a problem.
If they don't know about the previous work, they won't know to go there for more. If they do, it doesn't mean they instantly recognize it and know to skip.
plagiarism, with heavy sanctions, of self is of course ridiculous, but having as a standard that you should cite yourself when doing it is not a bad standard. As a reader, it might trigger a "where have I read this before" reaction which is akin to confusion; also having notice that there is another paper on this topic could be quite useful.
Academics base their careers around citation numbers. You need publications and a high H-index to make it anywhere. Self-plagiarism reduces the effectiveness of that metric, which makes it harder to evaluate the actual impact of a researcher.
It should be no surprise that republishing in multiple journals was accepted in the pre-computer era, where citations were inherently harder to track (and thus less valuable as a metric).
Quoting Upton Sinclair, "It is difficult to get a man to understand something, when his salary depends on his not understanding it."
(Yes, they are morons because no reasonable person would think this is fair. You need convoluted nonsense arguments to justify this)