I'm very surprised at your response to 1) "Replication should take place."
The words "replicate" or "replication" do not appear anywhere in the Guidelines, nor are there any statements that I can think might imply this.
I think the challenge as summarized by Denis Nobel is indeed fascinating - Is there an algorithm that can account for the autonomous origin of a coded messaging system? I also think the discovery/invention of such an algorithm would be scientifically momentous, and patently valuable.
Replication may or may not be an outcome in a system where spontaneous coded messaging originates, and it may or may not be a prior requirement for that spontaneous origin - I think "not" to both. To skew the challenge with this requirement, after the fact, I think is unnecessarily confusing and adds nothing substantive.
Your challenge has galvanized my previously scattered thinking on the issue and I would very much like to participate. But I do think anyone planning on submitting to the challenge is owed some greater clarity on the remit of the challenge. I hope you don't mind me putting it like that, but I do want to engage and I do wish there was a clearer statement.
Do you think that at this stage you are able to amend the challenge guidelines?