[Cryptography] reliable broadcast channel

[jamesd at echeque.com]

On 2020-11-09 10:37, Matt Palmer wrote:
> Alternately, if over half the participants are coordinating, what's to say
> their version of reality isn't the "correct" one, even if the other
> participants disagree?

But some of the participants may be unaware of disagreement.

The reason to have a reliable broadcast channel is so that everyone
knows what the one reality is.  The problem is having rather too many
realities.