Jim Macklin wrote:
Not correct, at least in the USA. There are some jets that
don't have a Vmca as such because the engines are so close
to the centerline and although they have two engines, they
don't meet the FAA requirement for issuing an unrestricted
multiengine certificate.

I don't think Vmc is the issue, just the failure to be able
to demonstrate handling asymetric thrust. There are some
regular twins where the Vmc is pretty much aligned with the
stall speed.