Petitioners submit such a blanket extension of existing terms exceeds Congress's power under the Copyright Clause and it violates the First Amendment. Now, the Government has responded to petitioners' argument in a way that betrays a simple but fundamental confusion.
There is likely confusion among the petitioners
It says that the government's response betrays a simple confusion, but most of the petitioners may not be confused at all. I think the language is a little murky in the excerpt.
( z1 likely :ARG1 ( z2 confuse :ARG1 ( z3 person :ARG0-of ( z4 petition ) ) ) )