There is a clear legal difference between human brains and computers. There has to be in order for copyright to work, because every time I consume a copyrighted work, I am creating a copy in my brain. I can legally read a short poem and have a perfect copy of that in my brain. If I later write down the poem that's now in my brain, that's when I'm breaking copyright - not before.
There is a legal technique called clean-room design to create a functional clone of something without breaking copyright law. It involves two teams of engineers working together. The first team examines the original and writes a specification. The second team creates the clone according to the specification without looking at the original. In order for this technique to work, the following all have to be true:
- It is legal for the first team to examine the original.
- Examining the original taints the first team. Because they now carry around a copy of the original in their brain, any clone they create will now legally be a derivative work.
- The specification that the first team creates is not itself tainted.
Any argument that it should be legal to do something on a computer if it's legal to do the same thing in a human brain is either an argument against copyright itself or an argument in favor of government thought control. I can sort of get behind the former, but our governments and courts have decided differently. The latter is completely unconscionable.