On 4 Oct 2019 at 16:53, Cian Witherspoon wrote:

> Fast FTL Radio
> Fast, cheap FTL communication makes it easy to hold an interstellar
> state together.

They ignore the possibility of fast, *expensive* FTL radio.

Blish's Dirac radio wasn't too expensive and it was fast. In fact it
was instantaneous. But it also had the problem that anybody with a
Dirac radio got the message.

It also had a "fun" flaw. Every message received started with the
Dirac "bleep". This was a "loud" multifrequency signal "blip". Turns
out that with the right equipment you could "spread it out" into
every Dirac radio message *ever*.

--
Leonard Erickson (aka shadow)
shadow at shadowgard dot com