If Darwinism was true, the definition of what it means to be classed as a "human being" occurs when:
- the product of two non-humans create a human being through procreation;
- the human being who was created created another human being through procreation with another non-human;
- two non-humans procreate two or more humans through the act of procreation, humans capable of procreation;
- two or more non-humans spontaneously change into human beings when acted upon by some external source.
Someone who actually believes in Darwinism may explain it better, but looking at it from my Christian standpoint, I don't see the logic or science behind Darwinism. We know the universe did have a beginning. It makes more sense that there is a God who created two human beings.