I have a question about plagiarism.
If a peer reviewer writes a negative review of a paper and rejects it, so that he or she can use the idea of the paper in their own work is that considered plagiarism?
Similarly, if a peer reviewer lifts sentences from a submitted, but rejected manuscript into their own paper is that considered plagiarism?
And if you have a strong suspicion either of those two have happened (e.g. you see a publication appear after a while with exactly the same phrasing as your submitted manuscript), is there anything you can do about it?