  We analyse recent high-quality Atacama Large Millimeter Array (ALMA)
molecular line mapping observations of the northeast jet of the young stellar
object (YSO) OMC 2/FIR6b (HOPS-60) and find that these ALMA observations are
much more likely to indicate a twin-jet structure than jet rotation, as
previously hypothesized. The interpretation of the line of sight velocity
gradient across (perpendicular to its axis) the northeast jet of Fir6b in terms
of jet rotation leads to jet-launching radii of ~2-3AU. However, the velocities
of the jets ~100-400 km/s are much larger than the escape speed from these
radii. We argue that the northeast jet of FIR6b is instead compatible with a
twin-jet structure, as observed in some planetary nebulae. Specifically, we
find that the main, redshifted jet emanating from the central YSO is composed
of two, very closely aligned, narrower jets that were launched by the central
YSO at about the same time but at different inclinations with respect to the
plain of the sky. This twin-jet structure removes the extreme requirement that
jets with velocities similar to the escape velocity from the YSO be launched
from very large radii. The YSO FIR6b and certain planetary nebulae also share
the characteristics of unequal structures and intensities of their two opposing
bipolar jets. We propose that such opposing lobe asymmetries can result from a
sub-stellar binary companion on an eccentric orbit that is inclined to the
accretion disk plane.
