SuStel:
mabom'eghmoH maH We cause each other to
sing.
Did you mean to write {mabomchuqmoH maH} ? I understand the {mabom'eghmoH maH} as "we caused ourselves to sing". SuStel:
But in your example you have the same entity
as the causer and the done upon, which is not
one of the times you use a reflexive suffix. So
your instincts are correct.
So, this means that if we have a transitive verb on which we place the {-moH}, then: a. this verb can't have the causer as subject and the done upon as object b. we can't use the {-'egh}/{-chuq} on this verb in a sentence, such as the "the vulcans caused the federation to accept them" So, we can't express the intended meaning in the way {*yadda*vaD X *verb*moH X}, and we need to recast. Right ? ~ nI'ghma