I'm still here. I'm venturing a comment that Clique Space is continuing, and it just now appears to me that I have perhaps resolved most of my concerns around the question of symmetry between challenges and messages.
Challenges - sent from initiator to respondent, represent queries asked by a specific device and on behalf of a specific Identity known as the respondent for information about quale associated with a specific resonance.
Messages - set from respondent to initiator, represent the state of a specific device which is associated with a pair of Identities (a belief - one is the claimant or the Identity making the claim, the other is the candidate or the Identity about which the claim is being made) associated with a specific resonance.
