Can an understanding of false belief be demonstrated in preverbal children (aka - before they can talk)? Why or why not?

Can an understanding of false belief be demonstrated in preverbal children (aka - before they can talk)? Why or why not? How does the research summarized in the readings on social cognition in infancy relate to older children's "Theory of Mind"?  If you answered this on the midterm: Now that you have read further on this, how has your answer changed since the midterm? (if you didn't answer this one on the midterm, you may skip the final part of this question.) answer in 1-3 paragraphs