There is an informal honour's code among scientists that you don't take credit for other people's ideas. While it is forgivable for a PhD or postdoc to be unawa

There is an informal honour's code among scientists that you don't take credit for other people's ideas. While it is forgivable for a PhD or postdoc to be unaware of older work -- after all there's sooo much of it -- a senior researcher should not act carelessly with attributions. And where they do, it's useful to remind them that they have transgressed dearly held ethical norms.