I tell you once,
I tell you twice,
What I tell you three times is true.
I was reading the wonderful Stand on Zanzibar by John Brunner and reminded myself of this bit from The Hunting of the Snark by Lewis Carrol:
Just the place for a Snark! I have said it twice:
That alone should encourage the crew.
Just the place for a Snark! I have said it thrice:
What I tell you three times is true.
And I had one of those "I wonder..." moments. So I did...