Is my 6 year old daughter a Cartesian dualist?

Recently, my daughter who just started Kindergarten informed me that she had been disciplined for talking when she should have been silent. Her teacher made her go sit silently at her desk. I asked her how she felt. "I felt sad," she replied. "Did you cry?" I asked. She replied, "No. I was only sad in my brain."

Most scientists reject outright the concept of dualism, as it implies that "thinking" can occur outside the brain. But my daughter's statement implied that she "owned" her brain, i.e., that her brain exists within a larger realm of consciousness..."of Isabelle!"...Out of the mouth of babes...?