Instruct: Given a premise, retrieve a hypothesis that is entailed by the premise.
Query: Why -- on the last point, it's -- I've counted that as zero. The reason I've counted it as zero is it seems to me that the added value, incentive value to produce between life plus 50, or life plus 70, is zero. It's carried out, as the economists do, to three decimal points, divide by 100 for the probability of your ever having such a work, and you get virtually zero, no difference between this and a perpetual copyright.
incentive value to produce from life plus 50, or life plus 70, is zero. 
copyrights are harmful economically
an unlimited time would violate the Copyright Clause, making people happy
Owners of verbatim works would lose money if their work was placed in the public domain
If Copyright 16 Clause was properly read, then people could make money by copying verbatim works
copyrights causes economic harms overall
copyrights causes economic harms
copyright retain their value throughtout the life
an unlimited time would violate the Copyright Clause, and not be fair
an unlimited time would violate the Copyright Clause, which is bad
The rate of contribution is not greater after leaving the job than just prior to leaving.
copyrights have commercial value after 10 years
an unlimited time would violate the Copyright Clause, which no one wants
an unlimited time would violate the Copyright Clause, adding to the confusion
No copyright lasts forever.
Copyrights aren't for forever.
Copyright terms are considered null and void if it is found that the creator never filed to include their heirs.
The copyright clause justifies extensions for works that have not been created yet.
an unlimited time would violate the Copyright Clause, and that's going to be harmful
70 years is too long for a copyright to last.
an unlimited time would violate the Copyright Clause, causing trouble
The expected monetary value can be seen as challenging to the economy.
It gets more convoluted than this, it's just that the context was cut down to a few sentences. 
Seeds are not the best for outdoor grows.
perpetual copyright has value