Missed approach (?) when glideslope fails

On Sun, 11 Sep 2005 20:38:20 GMT, Tauno Voipio
wrote:

AFAIK, there should be at least either operative outer
and middle marker or a co-located DME. The markers are
positioned so that outer marker is roughly at the crossing
of the intermediate approach altitude and glideslope
(the point where glide starts) and middle marker at
the crossing of glideslope and MDA.

Even if there is, I thought that we are talking about the case where
you don't have a MM, the GPS is broken, you aren't carrying DME (since
US regs allow GPS substitution for DME, with a few exceptions) and you
just lost your glideslope somewhere on the approach, and how you could
then identify the MAP.