If the node does not get reaped or edited, there is no message and the node is not noted.
(Assumption: Considerations do not time out. This may be 100% wrong.)
In what time frame? This is similar to the halting problem. Unless you were to set a timeout on consideration votes, it would be difficult to know when it fails. OTOH, perhaps if there is a known value of keeps where it will no longer have the potential of succeeding, then perhaps a failure note could be generated. It still leaves that in-between case where there have not been enough votes to tell definitively what the results will be.