In the debate over human embryonic stem cell research, protesters have ethical issues with experimenting on human embryos, while proponents point to the research’s huge potential to save lives. How come no one questions why we create extra cells to use or throw away in the first place?

In April of 2009, six weeks after President Obama’s executive order lifting the Bush era policy that restricted federal funding to 21 already-extant lines, the NIH published a set of criteria for ethical (and therefore fundable) stem cell research:

Software uses many kinds of data. Sometimes it concerns worksheet data and sometimes it is data that is retrieved or generated in some way or it are results of actions. Often these data are interrelated. In that case the ensemble forms a complex object. When this is the fact then it becomes worthwhile to attach the actions that are regularly applied to the data to the object that contains the data. With comparable data structures the same will happen. The object oriented software generation uses this approach intensively.