Chinese or Greek?

Before I was born, when my brother was little, he was taken care of by a family friend of ours. She had her own children, not to mention the neighbors who were always over. One time, when my dad went to pick up my brother, he confused one of the neighbors. The neighbor, a little girl, saw my dad holding my brother and noticed how the two of them don't resemble each other. (Which makes sense because my dad is full-blooded American and my brother is half Chinese half American)

"Are you Chinese?" she asked my dad.
"No," he responded.
Perplexed she tried another question, "Are you Greek?"
Once again my dad answered, "No."
Unable to come up with anything else she asks, "Then, what are you?"

Due to her limited exposure to her Greek family and her Chinese neighbors, she held a paradigm that everyone in the world was either Chinese or Greek. Through her experience with my father, she learned that there are other ethnicities exist, and she added that to her knowledge. Now she knows that there are people in the world who are neither Chinese nor Greek.

What is reality?

A woman is washing dishes. She has a view to the adjoining room. She sees her dog in the room walking away from her, but her dog is standing right at her feet.

In this scenario, we see a woman perceiving a dog in two different places at once. This brings up the problem of perception, and the idea of schizophrenia into the picture. Could she be seeing something that no one sees, or is she experiencing a break from reality? Due to the fact that she perceived her dog in two places at once, she is confused. Is hallucinating one of the dogs? If this is the case, which dog is real and which dog is fake? What is reality?