0 used to say that something is sad, disappointing, or has a bad effect: --
Unfortunately, the exact age and significance of the high-grade event remains unclear.
Unfortunately, unlike many linear equations, these nonlinear equations are generally not solvable in closed functional mathematical form.
Unfortunately this cannot account for the differences observed between appetitive and aversive tasks in non-primate species following amygdala damage.
Unfortunately she suffered complications in a later pregnancy and the stitch had to be removed.
Unfortunately, the measurement of cell proliferation has tended to be unreliable.
Unfortunately, this makes the testing of sensor models less straightforward.
Unfortunately, in most cases empirical testing has lagged the theoretical development of this class of models,1 including in the area of international relations.
I entirely agree, but only because this is a true story told from a first-person perspective, which does not, unfortunately, escape epiphenomenalism.