This is another major turning point for the biologist, as she recognizes that the psychologist is using hypnotism to influence her and the other team members. She also realizes that the psychologist is giving them a biased view of their surroundings (in contrast to their desire to stay objective about the place) by saying that they will continue to see a structure made of coquina and stone. This implies that the tower is
not, in fact, made of these materials, and that the women’s “objective” perception of their environment does not actually reveal the truth. Witnessing this, the biologist sees that her mistrust has been helpful, as it helps her recognize the psychologist as a potential threat.