IFR logging question - is this legal?

Jose wrote:
Well, actually the regs don't require the hood to be there either.
Strict logic says that the pilot flying under the hood is not required,
so the flight actually only requires one pilot. However, the FAA
=interprets= the regs as requiring two pilots in order to provide a
venue for instrument training. There is no reason, given this
interpretation, that they can't also interpret it the same way for IMC
training.

I don't follow. There is no reg that says IMC flights requires multiple
pilots (which is what 61.51(e) requires for multiple logging). Hood
time does have such a reg.

91.109
(b) No person may operate a civil aircraft in simulated instrument
flight unless-

(1) The other control seat is occupied by a safety pilot who possesses
at least a private pilot certificate with category and class ratings
appropriate to the aircraft being flown.

In order for multiple pilots to log time in IMC you would have to point
to a simular reg for actual instrument.