According to the director, why is bernard's talent all the more reason to let him go

Which example from lorraine hansberry's a raisin in the sun demonstrates the idea of self-determination?

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.

Which two sentences in this excerpt from the time machine by h.g. wells suggest that the morlocks possesses a degree of intelligence comparable to that of humans