Antoinette believes that her brother is not really her brother and that he has, in fact, been replaced by a double. This is known as _______________ syndrome

Which of these is NOT one of the concepts used by complexity theory to understand the universe?

A) Attractors B) Bifurcations C) Fractals D) Quarks

At the two-word phase, children’s speech is

a. telegraphic. b. empathetic. c. intuitive. d. grammatically perfect.