[r-t] proving a touch

[Ian McCulloch]

On Wed, 21 May 2014, John Warboys wrote:

> It doesn't contain that row, but no row occurs more than twice which I
> guess is the only criteria it's trying to meet.  In that respect, it'a
> also "true" to Cambridge.

I find this a bit surprising.  Is it generally the case that the quarter 
peals on ringing.org (and elsewhere?) of minor don't necessarily contain 
all the rows?  What about the doubles compositions, can they miss out rows 
too?

Cheers,
Ian