Making a high quality replica of the Mona Lisa requires work, and it still won't be identical—thus the term "replica". Making a high quality copy of a digital

Making a high quality replica of the Mona Lisa requires work, and it still won't be identical—thus the term "replica". Making a high quality copy of a digital work requires exactly no additional work. It actually takes more work to make a non-exact copy (say the CPU time of recompressing a JPEG with different compression settings). Because there's no work required to make an exact, indistinguishable copy, there is no scarcity. If this was just about recording the rights to use/exploit a work, digitally and mathematically backing the concept of copyright, that would be one thing. That would help with, say licensing stock photos. But what does it mean to "own" Jack's first tweet? How does one exploit that exclusive ownership? Is it the words of the tweet? An image of it?