I am a noob on copyright. Can I be sued. If I share a paper I have downloaded with my friend over email, as what is done using twitter
Just luke those mp3 services my fsther keeps getting which say their legal, yes they are, the works you acquire via them are not.
There is no logical badis to strip ownership frim a work if its transferred.
(While in the case of scientific works im not always in agreement with how their licensed, im not going to pretend their not covered by copyright).
You are only liable if you make a copy of the work without having the right to do so.
If you receive/acquire, you are not liable. But if you make a copy to share, then you are.
It is the right to make a copy. Not the right to obtain a copy.