Except that embryos are not potential human life, they are each a human being as much as the 5-year-old; they are just in a different stage of life.
In order to make a rational choice between saving the 5 year old or the embryos one must, I think, discern a categorical difference in human life outside the womb.
The 5 year old, I assume, is in a natural state. That is, naturally conceived, born and growing normally. Absent the fire, what is the probability of postponing the child’s death to its natural end?
The embryos are in an unnatural state. Unnaturally conceived, unborn and extra-uterine. Absent the fire, what is the probability of postponing their deaths to their natural end?
All the actor can do is remove fire as the proximate cause of any deaths. My reason tells me that the 5 year old is more likely to die of natural causes then are the embryos. I save the child.
Is this distinction sufficient to decide? If one says “no” and cannot discern an alternate
reason to save one or save the others then, and only then, one should let their emotion guide them. The Spirit urges us to do good and avoid evil through both faculties. Often it is only the
unreasonable emotions (emotions against reason) that lead us into error.