an ineresting book, from the synopisis:
"Since Plato, philosophers have described the decision-making process as either rational or emotional: we carefully deliberate or we "blink" and go with our gut. But as scientists break open the mind's black box with the latest tools of neuroscience, they're discovering that this is not how the mind works. Our best decisions are a finely tuned blend of both feeling and reason?and the precise mix depends on the situation. When buying a house, for example, it's best to let our unconscious mull over the many variables. But when we're picking a stock, intuition often leads us astray. The trick is to determine when to lean on which part of the brain, and to do this, we need to think harder (and smarter) about how we think."
Perhaps i am again at fault, when describing two types of decision making, and the it is again not a black and white issue, but a continuim where we mix. Humans like to simplify things (into black and white, or reducing them to their constituant parts as physics describes matter by it's most basic parts) to help in understanding them.
That said there is another way of understanding things which instead being reductionist is holistic - considering the whole rather than just the constituent parts.
The whole human is a holistic view of a person, rather than the reductionist description of skin cells and ceratine... etc.
For deciding whether a fetus is a human life we should consider the whole, not just the cells, but the whole system. Which includes not just a static fetus, but a processing of development. Constantly changing, developing toward something. The whole must include the mother as part of the system of development, and the part she takes, both before and after birth. The whole may in some people's view include God, but it is wrong for them to proscribe their views about God on others, (as it is wrong for Islamist fundamentalists to attack the western decadent values which they see as destroying their healthy way of living)