[r-t] FCHs

[Graham John]

MBD writes:

> I just find it hard to imagine a person clever enough to work out
> that a symmetrical plain method doesn't have internal falseness,
> but stupid enough to think the same argument works for TD.

Yes, but perhaps it is because they had proved everything to their
satisfaction with Minor, where the problem doesn't occur because of the
nature of the rows. They then just applied the same logic of checking the
leadheads and leadends.

Graham